If there are 100 cupboards with 4 shelves each, where each shelf contains 9 books, how many books are there in all cupboards?
Step 1: Find the number of books in each cupboard.
Multiply the number of shelves on each cupboard (4) by the number of books on each shelf (9).
Step 2: Find the number of books in all cupboards.
Multiply the number of cupboards (100) by the number of books in each cupboard (36).