Explanation:
you really don't know how to do this ?
you understand the concept of equally splitting or distributing an initial amount into various parts ? the division ?
remember things like
a large pizza is cut into 12 slices.
the pizza is distributed equally to your group of friends. everybody gets 2 slices. how many friends are here with you ?
12 / 2 = 6
tells us that the pizza gets shared between 6 people.
and because you are also a person, it means you have 5 friends with you (in total 6 people).
or the other way around : you and 5 friends (6 people) are sharing the pizza equally. how many slices does everybody get ?
12 / 6 = 2
tells us that everybody gets 2 slices.
so, now for our problem with the plates and boxes we do the same thing :
every box gets 5 slices (sorry, plates).
how many boxes are needed ?
2250 / 5 = 450 boxes