V 686 = V ( 7 * 49 * 2 ) = 7 V 7 * 2
V 126 = V ( 2 * 9 * 7 ) = 3 V 7 * 2
V 96 = V ( 2 * 6 * 8 ) = 4 V 6
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V 686 * V 126 = 21 * 7 * 2 = 294
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V 294 = V 6 *49 = 7 V 6
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( 4 V 6 ) : (7 V 6 ) = 4/7
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ответ 4/7