



 
Pat, There are 12 inches in a foot so your 4 inch squares are 4/12 = 1/3 feet on a side so each has an area of 1/3 × 1/3 = 1/9 square feet. There are 351 tiles so that's 351 × 1/9 = 39 square feet. Hence you will need 3 boxes of the 6 inch square tiles. I hope this helps,  


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