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Answer:

There are 1,512 books in all.

Step-by-step explanation:

All we need to do is multiply the number of books by the number of shelves.

So:

42 × 36 = 1,512.

wckubitz

Answer:1,512

Step-by-step explanation:

Since they are asking for the total number of books you multiply the number of shelves by the number of books each shelf can hold. 36x42