class Calculator:
    def plus(self, a, b):
        print(self.a + self.b)

    def minus(self, a, b):
        print(self.a - self.b)

    def div(self, a, b):
        print(self.a / self.b)

    def multiple(self, a, b):
        print(self.a * self.b)


class SetCalculator(Calculator):
    def __init__(self, a, b):
        self.a = a
        self.b = b

    def plus(self):
        super(SetCalculator, self).plus(self.a, self.b)

    def minus(self):
        super(SetCalculator, self).minus(self.a, self.b)

    def div(self):
        super(SetCalculator, self).div(self.a, self.b)

    def multiple(self):
        super(SetCalculator, self).multiple(self.a, self.b)