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18 x 18 inch square is equal to

3/2 x 3/2 foot square = 9/4 square foot.

To cover 154 foot square (you don't mean 154 square feet) is

(154 x 154) / (9/4)

= (154 x 154 x 4) / 9 = 10540.44, so you will need 10541 tiles

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13y ago

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