hi so I haven’t done this since 6th grade but I think I could still help you out.
In order to use all the supplies, the number of kits made must be a multiple of 4 (for paper pads), a multiple of 27 (for pencils) and a multiple of 12 (for erasers). The least number that satisfies this is called the Least Common Multiple (LCM).
It must have factors that include the factors of 4 (2,2), the factors of 27 (3,3,3) and the factors of 12 (2,2,3).
The least number that does that has factors of (2,2,3,3,3), which is 108.