i am trying to use magic method in python but i can not quite execute the class. this is what i have so far I am missing something?

lass my_cal(object): def __init__(self, x, y): self.x = x self.y = y def __add__(self, other): X = self.x + other.x Y = self.y + other.y return my_cal(X, Y) def __radd__(self, other): if other == 0: return self else: return self.__add__(other) def __str__(self): return "{} + {} = {}" % (self.x, self. y, FV) FV = my_cal(x= int(input('enter number ')), y=int(input('enter number '))) print (FV)