Two tiles will suffice since they will cover 36 square feet.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
192 tiles
If you buy 18 boxes you will have enough, plus a few extra. 18 boxes will cover just over 434 square feet.
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
76.6 tiles
67 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
90 tiles.