def _calculate_mod97(self, account_number: str) -> str:
        """Calculate the mod 97 check digits for a given account number."""
        remainder = int(account_number) % 97
        return str(remainder).zfill(2) if remainder != 0 else "97"
Calculate the mod 97 check digits for a given account number.
faker/providers/bank/nl_BE/__init__.py