V 810 = V ( 9 * 9 * 10) = 9 V 10
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V 242 = V ( 2 * 11 * 11 ) = 11 V 2
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V 288 = V ( 12 * 12 * 2 ) = 12 V 2
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V 108 = V ( 3 * 2 * 2 * 3 * 3 ) = ( 2 * 3 ) V ( 3 ) = 6 V 3