Why this is failing in some places .

Question

Help me to solve it .
https://code.sololearn.com/c1T8p461fif9/?ref=app

Answer 1

I would suggest using float for all the calculations, then rounding at the end.

Answer 2

import math

And change this line
tax = ((canvas + cost_paint )//10)
To
tax = math.ceil((canvas + cost_paint) * .1)

You can get the input as an int()