6' x 9' (54 square feet) = 6 square yards of tiles needed.
Assuming that 12 x 12 is 12" x 12" (one square foot), then 30 one-square-foot tiles would cover 30 square feet.
If that is 2' x 4' it would cover 800 square feet. If it is 2" x 4" it would cover about 5.5 square feet.
just do 249 divided by 18
80 if the tiles are 12x12 - 12x12 is one square foot covering 80 you would need 80 tiles
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
192 tiles
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
Two tiles will suffice since they will cover 36 square feet.
76.6 tiles
67 tiles.
190
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
90 tiles.
500/1.78 = 281 tiles
It will require a minimum of 1,462 tiles. That number will cover about 1,850.34 square feet.
If the 6x12 tiles are in inches, it will take two of them to cover a square foot. You will need 210 of them.