For anyone confused how math.floor(x * 10^n) / (10^n) actually works here is an explanation.
The x * 10^n is meant to shift x by n places. So if you have the number 10.25 and multiply by 10^2 which is 100 that leaves you with 1025. Given this logic you could now floor the number which will cut off the remaining decimal portion if there was any and then divide by the original 10^n because you want to put your number back to the same significant figures.