Sheets of drywall that measure 4′ x 12′ are required to be placed on the ceiling and walls are to be placed in a room having interior dimensions of 14′ x 22′. How many sheets of 4′ x 12′ drywall are needed. Do not include waste.

Sheets of drywall that measure 4′ x 12′ are required to be placed on the ceiling and walls are to be placed in a room having interior dimensions of 14′ x 22′. How many sheets of 4′ x 12′ drywall are needed. Do not include waste.