56
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3220
No, 3224+72603=76227
There are quite a few ways to do it. Here's one. 62 x 52 = 62 x (50 + 2) = (62 x 50) + (62 x 2) = 3100 + 124 = 3224
The first 25 multiples of 403: 403, 806, 1209, 1612, 2015, 2418, 2821, 3224, 3627, 4030, 4433, 4836, 5239, 5642, 6045, 6448, 6851, 7254, 7657, 8060, 8463, 8866, 9269, 9672, 10075 . . .
Outside surface area = 2*(L*W + W*H + H*L) = 2*(676 + 468 + 468) = 2*1612 = 3224 square inches.