Pls what is the problem in this code

Question

https://code.sololearn.com/cJy17tmMHQA2/?ref=app

Answer 1

Do not indent line 17, 18, 19, 20, 21, 26, 28.

For operands, you have to convert input to int, e.g.

num1 = int(input())

Answer 2

Now i get it.Thanks so much