<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!--XBRL Document Created with XBRLMaster-->
<!--Version: 2.3.08-->
<!--Based on XBRL 2.1-->
<!--Date of creation: 03/14/2026-->
<!--Software architectural design and coding: A'c Dharmapremananda Avt.-->
<!--Copyright (c) 2026 I-NET Business Solutions, Inc. All Rights Reserved.-->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://crona.com/role/Cover" xlink:href="crona-20250930.xsd#Cover" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/BalanceSheets" xlink:href="crona-20250930.xsd#BalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/BalanceSheetsParenthetical" xlink:href="crona-20250930.xsd#BalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/StatementsOfOperationsUnaudited" xlink:href="crona-20250930.xsd#StatementsOfOperationsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/StatementsOfStockholdersDeficitEquityUnaudited" xlink:href="crona-20250930.xsd#StatementsOfStockholdersDeficitEquityUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/StatementsOfCashFlowsUnaudited" xlink:href="crona-20250930.xsd#StatementsOfCashFlowsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/OrganizationAndNatureOfBusiness" xlink:href="crona-20250930.xsd#OrganizationAndNatureOfBusiness" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/GoingConcern" xlink:href="crona-20250930.xsd#GoingConcern" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="crona-20250930.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/PropertyPlantAndEquipment" xlink:href="crona-20250930.xsd#PropertyPlantAndEquipment" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/IntangibleAssets" xlink:href="crona-20250930.xsd#IntangibleAssets" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/ConvertiblePromissoryNote" xlink:href="crona-20250930.xsd#ConvertiblePromissoryNote" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/RelatedPartyTransactions" xlink:href="crona-20250930.xsd#RelatedPartyTransactions" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/StockholdersEquity" xlink:href="crona-20250930.xsd#StockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/CommitmentsAndContingencies" xlink:href="crona-20250930.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/SubsequentEvents" xlink:href="crona-20250930.xsd#SubsequentEvents" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="crona-20250930.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/SummaryOfSignifcantAccountingPoliciesTables" xlink:href="crona-20250930.xsd#SummaryOfSignifcantAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/PropertyPlantEquipmentTables" xlink:href="crona-20250930.xsd#PropertyPlantEquipmentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/IntangibleAssetsTables" xlink:href="crona-20250930.xsd#IntangibleAssetsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/ConvertiblePromissoryNoteTables" xlink:href="crona-20250930.xsd#ConvertiblePromissoryNoteTables" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/GoingConcernDetailsNarrative" xlink:href="crona-20250930.xsd#GoingConcernDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/SummaryOfSignifcantAccountingPoliciesDetails" xlink:href="crona-20250930.xsd#SummaryOfSignifcantAccountingPoliciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" xlink:href="crona-20250930.xsd#SummaryOfSignificantAccountingPoliciesDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/PropertyPlantEquipmentDetails" xlink:href="crona-20250930.xsd#PropertyPlantEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/PropertyPlantEquipmentDetailsNarrative" xlink:href="crona-20250930.xsd#PropertyPlantEquipmentDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/IntangibleAssetsDetails" xlink:href="crona-20250930.xsd#IntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/IntangibleAssetsDetailsNarrative" xlink:href="crona-20250930.xsd#IntangibleAssetsDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/ConvertiblePromissoryNoteDetails" xlink:href="crona-20250930.xsd#ConvertiblePromissoryNoteDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/ConvertiblePromissoryNoteDetailsNarrative" xlink:href="crona-20250930.xsd#ConvertiblePromissoryNoteDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/RelatedPartyTransactionsDetailsNarrative" xlink:href="crona-20250930.xsd#RelatedPartyTransactionsDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://crona.com/role/StockholdersEquityDetailsNarrative" xlink:href="crona-20250930.xsd#StockholdersEquityDetailsNarrative" xlink:type="simple" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/Cover" xlink:title="00000001 - Document - Document and Entity Information" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/BalanceSheets" xlink:title="110200 - Statement - BALANCE SHEETS">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaapAssetsCurrent" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="loc_us-gaapPrepaidExpenseCurrent" />
    <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapPrepaidExpenseCurrent" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaapAssetsNoncurrent" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaapFiniteLivedIntangibleAssetsNet" />
    <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapFiniteLivedIntangibleAssetsNet" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaapPropertyPlantAndEquipmentNet" />
    <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="loc_us-gaapAssets" />
    <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsCurrent" xlink:type="arc" weight="1" />
    <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsNoncurrent" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaapLiabilitiesCurrent" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaapAccountsPayableCurrent" />
    <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccountsPayableCurrent" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrent" xlink:label="loc_us-gaapInterestPayableCurrent" />
    <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapInterestPayableCurrent" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="crona-20250930.xsd#crona_DueToRelatedPartyCurrent" xlink:label="loc_cronaDueToRelatedPartyCurrent" />
    <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_cronaDueToRelatedPartyCurrent" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableCurrent" xlink:label="loc_us-gaapConvertibleNotesPayableCurrent" />
    <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapConvertibleNotesPayableCurrent" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaapLiabilitiesNoncurrent" />
    <link:loc xlink:type="locator" xlink:href="crona-20250930.xsd#crona_PromissoryNotesPayableRelatedPartiesNoncurrent" xlink:label="loc_cronaPromissoryNotesPayableRelatedPartiesNoncurrent" />
    <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_cronaPromissoryNotesPayableRelatedPartiesNoncurrent" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaapLiabilities" />
    <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesCurrent" xlink:type="arc" weight="1" />
    <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesNoncurrent" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaapStockholdersEquity" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaapPreferredStockValue" />
    <link:calculationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapPreferredStockValue" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaapCommonStockValue" />
    <link:calculationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapCommonStockValue" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaapAdditionalPaidInCapital" />
    <link:calculationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapAdditionalPaidInCapital" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaapAccumulatedOtherComprehensiveIncomeLossNetOfTax" />
    <link:calculationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapAccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaapRetainedEarningsAccumulatedDeficit" />
    <link:calculationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapRetainedEarningsAccumulatedDeficit" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaapLiabilitiesAndStockholdersEquity" />
    <link:calculationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapLiabilities" xlink:type="arc" weight="1" />
    <link:calculationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapStockholdersEquity" xlink:type="arc" weight="1" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/BalanceSheetsParenthetical" xlink:title="110201 - Statement - BALANCE SHEETS (Parenthetical)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/StatementsOfOperationsUnaudited" xlink:title="124100 - Statement - STATEMENTS OF OPERATIONS (UNAUDITED)">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaapOperatingExpenses" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues" xlink:label="loc_us-gaapRevenues" />
    <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapRevenues" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="crona-20250930.xsd#crona_AmortizationOnConvertiblePromissoryNote" xlink:label="loc_cronaAmortizationOnConvertiblePromissoryNote" />
    <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_cronaAmortizationOnConvertiblePromissoryNote" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaapDepreciationAndAmortization" />
    <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapDepreciationAndAmortization" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaapGeneralAndAdministrativeExpense" />
    <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapGeneralAndAdministrativeExpense" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfessionalFees" xlink:label="loc_us-gaapProfessionalFees" />
    <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapProfessionalFees" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaapShareBasedCompensation" />
    <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapShareBasedCompensation" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaapOtherNonoperatingIncomeExpense" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaapInterestExpense" />
    <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOtherNonoperatingIncomeExpense" xlink:to="loc_us-gaapInterestExpense" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaapGainsLossesOnExtinguishmentOfDebt" />
    <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOtherNonoperatingIncomeExpense" xlink:to="loc_us-gaapGainsLossesOnExtinguishmentOfDebt" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
    <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapOperatingExpenses" xlink:type="arc" weight="-1" />
    <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapOtherNonoperatingIncomeExpense" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
    <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaapIncomeTaxExpenseBenefit" />
    <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapIncomeTaxExpenseBenefit" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaapComprehensiveIncomeNetOfTax" />
    <link:calculationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapComprehensiveIncomeNetOfTax" xlink:to="loc_us-gaapNetIncomeLoss" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaapOtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" />
    <link:calculationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapComprehensiveIncomeNetOfTax" xlink:to="loc_us-gaapOtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:type="arc" weight="1" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/StatementsOfStockholdersDeficitEquityUnaudited" xlink:title="148600 - Statement - STATEMENTS OF STOCKHOLDERS (DEFICIT) EQUITY (UNAUDITED)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/StatementsOfCashFlowsUnaudited" xlink:title="170000 - Statement - STATEMENTS OF CASH FLOWS (UNAUDITED)">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaapProfitLoss" />
    <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapProfitLoss" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaapAmortizationOfIntangibleAssets" />
    <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapAmortizationOfIntangibleAssets" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaapDepreciation" />
    <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapDepreciation" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="loc_us-gaapAmortizationOfDebtDiscountPremium" />
    <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapAmortizationOfDebtDiscountPremium" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:label="loc_us-gaapIncreaseDecreaseInPrepaidExpense" />
    <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInPrepaidExpense" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInNotesPayableCurrent" xlink:label="loc_us-gaapIncreaseDecreaseInNotesPayableCurrent" />
    <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInNotesPayableCurrent" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsPayable" />
    <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsPayable" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="crona-20250930.xsd#crona_InterestExpenses" xlink:label="loc_cronaInterestExpenses" />
    <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_cronaInterestExpenses" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaapGainsLossesOnExtinguishmentOfDebt" />
    <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapGainsLossesOnExtinguishmentOfDebt" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromRelatedPartyDebt" xlink:label="loc_us-gaapProceedsFromRelatedPartyDebt" />
    <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromRelatedPartyDebt" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" />
    <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:type="arc" weight="1" />
    <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:type="arc" weight="1" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/OrganizationAndNatureOfBusiness" xlink:title="995446 - Disclosure - ORGANIZATION AND NATURE OF BUSINESS" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/GoingConcern" xlink:title="995447 - Disclosure - GOING CONCERN" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/SummaryOfSignificantAccountingPolicies" xlink:title="995448 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/PropertyPlantAndEquipment" xlink:title="995449 - Disclosure - PROPERTY PLANT AND EQUIPMENT" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/IntangibleAssets" xlink:title="995450 - Disclosure - INTANGIBLE ASSETS" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/ConvertiblePromissoryNote" xlink:title="995451 - Disclosure - CONVERTIBLE PROMISSORY NOTE" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/RelatedPartyTransactions" xlink:title="995452 - Disclosure - RELATED PARTY TRANSACTIONS" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/StockholdersEquity" xlink:title="995453 - Disclosure - STOCKHOLDERS EQUITY" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/CommitmentsAndContingencies" xlink:title="995454 - Disclosure - COMMITMENTS AND CONTINGENCIES" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/SubsequentEvents" xlink:title="995455 - Disclosure - SUBSEQUENT EVENTS" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:title="995456 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/SummaryOfSignifcantAccountingPoliciesTables" xlink:title="995457 - Disclosure - SUMMARY OF SIGNIFCANT ACCOUNTING POLICIES (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/PropertyPlantEquipmentTables" xlink:title="995458 - Disclosure - PROPERTY PLANT EQUIPMENT (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/IntangibleAssetsTables" xlink:title="995459 - Disclosure - INTANGIBLE ASSETS (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/ConvertiblePromissoryNoteTables" xlink:title="995460 - Disclosure - CONVERTIBLE PROMISSORY NOTE (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/GoingConcernDetailsNarrative" xlink:title="995461 - Disclosure - GOING CONCERN (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/SummaryOfSignifcantAccountingPoliciesDetails" xlink:title="995462 - Disclosure - SUMMARY OF SIGNIFCANT ACCOUNTING POLICIES (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" xlink:title="995463 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/PropertyPlantEquipmentDetails" xlink:title="995464 - Disclosure - PROPERTY PLANT EQUIPMENT (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/PropertyPlantEquipmentDetailsNarrative" xlink:title="995465 - Disclosure - PROPERTY PLANT EQUIPMENT (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/IntangibleAssetsDetails" xlink:title="995466 - Disclosure - INTANGIBLE ASSETS (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/IntangibleAssetsDetailsNarrative" xlink:title="995467 - Disclosure - INTANGIBLE ASSETS (Details Narrative )" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/ConvertiblePromissoryNoteDetails" xlink:title="995468 - Disclosure - CONVERTIBLE PROMISSORY NOTE (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/ConvertiblePromissoryNoteDetailsNarrative" xlink:title="995469 - Disclosure - CONVERTIBLE PROMISSORY NOTE (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/RelatedPartyTransactionsDetailsNarrative" xlink:title="995470 - Disclosure - RELATED PARTY TRANSACTIONS (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://crona.com/role/StockholdersEquityDetailsNarrative" xlink:title="995471 - Disclosure - STOCKHOLDERS EQUITY (Details Narrative)" />
</link:linkbase>
