Help in exercise for loop

[kais92]

I'm using python2 because is the one that's using the course that I'm taking, maybe if I used python3 I wouldn't learn the lesson properly. If you tell me that it's better to use python3 anyway I will change it (as I don't understand the differences)

For the query you gave me the result is not correct as the program is changing the base for the new one in each iteration.

Thanks