The answer will depend on the measurement units used for 3x6.
270
It depends on how big the tiles are.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
67 tiles.
76.6 tiles
192 tiles
How many 24x24 tiles it take to cover a 14×14 room
start with 38 tiles.
Two tiles will suffice since they will cover 36 square feet.
616 3x6 inch tiles are needed to cover exactly 77 square feet.
4,036 sqare miles (mi^2)
0.25 sqare feet= 1 feet.