def f(number):
s = 1
for x in str(number):
if x != '0':
s *= int(x)
return s
print(f(123))
print(f(100101))
ZGVmIGYobnVtYmVyKToKCXMgPSAxCglmb3IgeCBpbiBzdHIobnVtYmVyKToKCQlpZiB4ICE9ICcwJzoKCQkJcyAqPSBpbnQoeCkKCXJldHVybiBzCgkKCQpwcmludChmKDEyMykpCnByaW50KGYoMTAwMTAxKSk=