If the tiles measure 12 inches square then the area of each tile is 1 sq foot.
Therefore 1400 tiles are needed to cover an area of 1400 square feet.
However, the actual dimensions of the area being tiled can affect the number of tiles required so closer examination is needed.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
67 tiles.
76.6 tiles
You will need at least 67 tiles. This will cover 150.75 square feet.
How many 24x24 tiles it take to cover a 14×14 room
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.
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
67 tiles.
76.6 tiles
190
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.
You will need at least 67 tiles. This will cover 150.75 square feet.
500/1.78 = 281 tiles