Nine you retard! Twelve by twelve inches is one square foot you GENIUS!
P.S. If you are not setting them straight by staright, you would want to leave about inch of plaster in between each tile so they wont break easy and can expand and shrink with the cold weather.
How many 24x24 tiles it take to cover a 14×14 room
5,184 2-square-inch tiles are needed.
1540
18..
647
How many 24x24 tiles it take to cover a 14×14 room
6' x 9' (54 square feet) = 6 square yards of tiles needed.
240 square tiles are needed
5,184 2-square-inch tiles are needed.
236 18-inch tiles.
Each tile covers 4 square feet. Which means you need 200 tiles to cover 800 square feet, plus spoilage.
1540
968
647
18..
616 3x6 inch tiles are needed to cover exactly 77 square feet.
216- 2x2