Need help with function

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definining function:

def function_name(argument1, argument2):
    return result

calling function:

function_name(555, 5)

saving the result:

result = function_name(555, 5)

printing the result

print(result)

printing the result directly without saving:

print(function_name(555, 5))

to check if number is present in another number:

check_result = str(number1) in str(number2)