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57 magazines per box.
228/4=57
Not sure if this was the answer you were searching for, but this is what I interpreted it to be.

Answer:

912

Step-by-step explanation:

you just have to multiply 228 by 4, you have to multiply in this because 4 boxes in the problem states that its going to be in groups and in groups is a math multiplication term therefore multiply 228 by 4 and you get 912

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