[Solved] Thread Shed - Step 20: Why is my code returning 1 and not 28?

I have to follow along with the YouTube because I’m honestly terrible at this… but why does my code return 1 and not 28 when I’m just following along with the Codeacademy guy since step 1?

Indentation issue: Python doesn’t like mixing four spaces and tabs to create indentations. Commenting after lines will mess up the Python indentation scheme (do not recommend for the future.