class Value:

    def __init__(self, value, operands = (), operator = '') -> None:
        self.value = value
        self.operands = set(operands)
        self.operator = operator

    def __add__(self, other) -> 'Value':
        output = Value(self.value + other.value, (self, other), '+')
        return output

    def __mul__(self, other) -> 'Value':
        output = Value(self.value * other.value, (self, other), '*')
        return output

    def __repr__(self) -> str:
        return f'Value({self.value})'

if __name__ == '__main__':
    x = Value(3.0)
    y = Value(4.0)
    z = x * y
    print(z.value)
    print(z.operands)
    print(z.operator)