Jay-Z's office contains 12 file cabinets. Three cabinets have 4 drawers,all the other cabinets have 5 drawers. Jay-Z's assisant is typing new labels for each file cabinet drawer. How many labels will she need?
12 - 3 = 9
(3 * 4) + (9 * 5) = ?
(3 * 4) + (9 * 5) = ?