calculator.py

class Calculator:
    def __init__(self):
        self.num1=int(input("Enter the first number :- "))
        self.num2 = int(input("Enter the second number :- "))

    def add(self):
        r=self.num1 + self.num2
        result= 'The sum of '+str(self.num1)+' and '+str(self.num2) +' is '+str(r)
        print(result)
        return result

    def subtract(self):
        r = self.num1 - self.num2
        result = 'The difference of ' + str(self.num1) + ' and ' + str(self.num2) + ' is ' + str(r)
        print(result)
        return result

    def multiply(self):
        r = self.num1 * self.num2
        result = 'The product of ' + str(self.num1) + ' and ' + str(self.num2) + ' is ' + str(r)
        print(result)
        return result

    def divide(self):
        r = self.num1 / self.num2
        result = 'The quotient when ' + str(self.num1) + ' is divided by ' + str(self.num2) + ' is ' + str(r)
        print(result)
        return result



if __name__ == '__main__':
    operation = Calculator()
    operation.add()
    operation.subtract()
    operation.multiply()
    operation.divide()