Number of books in a box = 100 block
Total number of Blocks =2,340 block
Minimum number of Box required

As, Number of Boxes can't be in Decimals.It must be a Positive Integer.
So, 23<23.40<24
So, Minimum Number of Boxes , if there are 2,340 block, if in each Box there are 100 Block=24 Boxes