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1421 is equivalent to 812
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Related: 28/21 and 8/12 14/21 and 16/12 14/42 and 8/12 14/21 and 8/24 42/21 and 8/12 14/21 and 24/12 14/63 and 8/12 14/21 and 8/36 70/21 and 8/12 14/21 and 40/12 14/21 and 8/60 98/21 and 8/12 14/21 and 56/12 14/21 and 8/84
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