"warehousing" Formula to Find Boxes required, to fit total units ammount!

[Echo9R]

Hi there yall
I'm not an expert on Excel but im trying to figure out some
formula for something i don't know the name.

Sorry, for that reason i cannot use the search option on the
forum.

Please check attachment for more info.
Excel Mistery.xlsx

This is what i am trying to create.

excelmistery.png

*Cell A3 is where i manually add Unit amounts.
*Cells B2 and C2 are Boxes Sizes

Cell B3 will show how many "size 20 boxes" are required to fit all A3 Units

Cell C3 will show how many "size 26 boxes" are required to fit all A3 Units


This must be fairly simple job, any help would be much
appreciated on the solution, or a reply with the link to the formula name.

Huge Thanks in advance.
Keep up the Great Work
Joe

[oeldere]

See the attached file.

I used roundup for the result.

[Echo9R]

Massive Thanks!