It will take 60 tiles. However the last row and the last column will only consist of partial tiles and have to be cut..
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13 x 13 (assumed inches) is 13/12 feet x 13/12 feet, so the area of one tile is 169/144 square feet. To cover 100 square feet you need (100)/(169/144) tiles which works out to (100 x 144)/169 = 14400/169 = 85.2, make it 86 tiles
157 18 by 18 tiles are needed to cover 352 square feet.
13 in is 1.0833 ft. 1.08332 is 1.174feet squared per tile. 27/1.174 is 23 tiles, give or take a small decimal. Depending on the length compared to width you will likely need to split tiles to have 23 tiles do the job
18 10x10-inch tiles.
If the tiles are 1 foot squares, it will take 1,650 of them to cover 1,650 square feet. If the tiles are 16 inch square (1-1/3 square feet, each), then it would take 1,238 tiles.