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

    def add(self, a, b):
        return a + b

    def sub(self, a, b):
        return a - b

    def multiply(self, a, b):
        return a * b

    def divide(self, a, b):
        return a / b


cal = Calculator()
print(cal.add(5, 6))
