67 tiles.
10
288
266.666666666 so rounding up 267 tiles.
You'll need 200 18-inch tiles.
192 tiles
67 tiles.
start with 38 tiles.
220
The answer depends on the measurement units used for 18x18.
22.2 tiles so buy 23 tiles.
10
288
118
266.666666666 so rounding up 267 tiles.
You'll need 200 18-inch tiles.
12...