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The surface area would increase by x16, e.g. 2x2x2 box= 24cm squared 8x8x8 box= 384cm squared :384/24=16
9 squared is 81 and 16 squared is 256
16 units squared
16 to the 4th power, or 16 x 16 x 16 x 16 = 65,536
16 squared equals 256.