Hi, thanks for the report ! 
This is a little funky…
The problem was that i assumed that math operators work the same in lua and JS.
So a new version is up
Seems like i will have to look up math in JS again.
I am still baffled about the fact that (28 ^ 2 - 18 * 28) * 100 and ((28 ^ 2) - (18 * 28)) * 100 return different values tho.