If it's 12"x12", each one is a square foot, meaning they'd cover 40 square feet.
But if it's 12'x12', each one is a ridiculous 144 square feet, which would mean they'd cover 5760 square feet.
Units of measurement are important.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
67 tiles.
76.6 tiles
How many 24x24 tiles it take to cover a 14×14 room
You will need at least 67 tiles. This will cover 150.75 square feet.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
192 tiles
67 tiles.
76.6 tiles
190
Two tiles will suffice since they will cover 36 square feet.
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
500/1.78 = 281 tiles
start with 38 tiles.
How many 24x24 tiles it take to cover a 14×14 room
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.