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81 x 3 = 243
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3 x 3 x 3 x 3 = 81
1 x 81, 3 x 27, 9 x 9, 27 x 3, 81 x 1
81 = 3 x 3 x 3 x 3 or 34
81 = 3 x 27 = 3 x 3 x 9 = 3 x 3 x 3 x 3