In How Many Ways Can 12 In How Many Ways Can 12 Different Books Be Distributed To 4 Identical Boxes If Each Box Gets Exactly 3 Books?

In how many ways can 12 different books be distributed to 4 identical boxes if each box gets exactly 3 books? - in how many ways can 12

I will (use the formula S n, k)? This is how to map these 12 different objects to four identical boxes ... so it looks like a good idea, but I feel the need to divide or so ....

Thanks