class calculator():
    def add(num1,num2):
        add = num1+num2
        return add
    def subtract(num1,num2):
        subtract = num1-num2
        return subtract
    def multiply(num1,num2):
        multiply = num1*num2
        return multiply
    def divide(num1,num2):
        divide = num1/num2
        return divide  
