About 100 but that depends on the shape of the 80 sq ft surface being covered and whether you are willing to cut the tiles several times or not. 100*13*9=11700 sq in
80*144=11520 sq in
so you don't even have two tiles over if the shape were perfect for the tiles.
113 tiles
55 tiles
125 16-inch tiles.
18 10x10-inch tiles.
297 16x16-inch tiles.
113 tiles
56 tiles to cover 224 square feet.
55 tiles
125 16-inch tiles.
18 10x10-inch tiles.
297 16x16-inch tiles.
236 18-inch tiles.
It would be 9 tiles wide by 12 tiles long. That gives you a total of 108 tiles.
1296 Tiles
270 tiles exactly.
Depends on the size of the tiles.
You will need 44 six inch tiles to cover 11 square feet.