محاسبه فاکتوریل

import time
start_time = time.time()

class FACTO:
    def __init__(self,number):
        self.number = number
    def factor_number(self):
        a = 1
        for i in range(a,self.number +1):
            a = a * i
        return a
while True:
    if time.time() - start_time > 15:
        print("time out")
        break
    num = int(input("enter your number ="))
    print(FACTO(num).factor_number())