
class Calculator:
    def add_number(a,b):
        return a + b

    
    def sub_number(a,b):
        return a - b

        
    def mul_number(a,b):
        return a * b

        
    def div_number(a,b):
        return a / b



# from mycalculator import calculator
# calculator.add_number(7,8)