A mailman has to deliver 48 pieces of junk mail.  There are 8 houses on the block.  2 of the houses have white mailboxes and 3 have red mailboxes.  How many pieces of junk mail will each of those houses get?
The mailman has 48 pieces of junk mail / 8 houses = <T>divide(48, 8)=6.0 pieces per house.
The houses with white mailboxes get 2 * 6 pieces = <T>multiply(2, 6)=12 pieces of junk mail.
The houses with red mailboxes get 3 * 6 pieces = <T>multiply(3, 6)=18 pieces of junk mail.
The houses with red and white mailboxes will get a total of 12 + 18 = <T>add(12, 18)=30 pieces of junk mail.
30/5 = <T>divide(30, 5)=6.0 pieces of junk mail each
