A square 20-inch tile is 2.78 square feet.
This tile has an area of 1 ft2.
1.78 sq feet per tile.
4,800 6-inch square tiles.
3.5555 square feet.
440 6-inch square tiles.
A 12 inch square tile covers a square foot. Doing the math gives an answer of 750 tiles.
67.5
2.25 square feet
288 6-inch tiles are needed.
There are 144 18 square inch tiles in an area of 18 square feet.
2.007 sq ft