The answer will depend on the units used for 12 x 12. It should be blindingly obvious to anybody that the number of 12 inch x 12 inch tiles or 12 cm x 12 cm tiles will be quite different.
Each tile covers 81 square inches. You have 1,296 square inches to cover. It will take 16 tiles to cover that area.
Approximately 73 square feet.
A tile measuring 2 foot by two foot (which, incidentally, is an unusually large tile) has an area of 4 square feet, so it would take 100 such tiles to cover a 400 square foot floor.
a 12 x 12 tile is 1 square foot. So, you would need 300 tiles to cover 300 square feet
It will take a minimum of 138 tiles. But it could take a lot more depending on the shape that you need to cover. For example, if it is a long narrow strip which is 1.1 ft wide then, unless you want to have a huge amount of mosaic, you will need 251 tiles.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
76.6 tiles
67 tiles.
190
Two tiles will suffice since they will cover 36 square feet.
500/1.78 = 281 tiles
157 18 by 18 tiles are needed to cover 352 square feet.
start with 38 tiles.
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
You will need at least 67 tiles. This will cover 150.75 square feet.
It will require a minimum of 1,462 tiles. That number will cover about 1,850.34 square feet.
110 tiles