Who can understand this code?

Question

https://code.sololearn.com/cVuPE2TSxYiD/?ref=app

Answer 1

Oh wow it seems like when you parse a string you can choose the base 😮😮 so 101 in binary (base 2) is 5 and 010 in base 2 is 2. Then you add them, 5+2 and you get 7

Answer 2

Its parse 101 as 5 and 010 as 2, then calculate its sum. Its equals 5+2=7