What's wrong in this code?

Question

Code coach : paints cost
https://code.sololearn.com/cJyA3fzY6Nu7/?ref=app

Answer 1

https://www.sololearn.com/discuss/2123776/?ref=app
https://www.sololearn.com/discuss/2115490/?ref=app
https://www.sololearn.com/discuss/2104980/?ref=app
https://www.sololearn.com/discuss/2117961/?ref=app
https://www.sololearn.com/discuss/2129322/?ref=app

Answer 2

Final result must be rounded up so use math.ceil

Answer 3

Thank you guys i solved it
round(number)

Answer 4

How to use math.ceil in python?
I tried
import math
math.ceil(number)
It doesn't work