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1421 is equivalent to 69
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Related: 28/21 and 6/9 14/21 and 12/9 14/42 and 6/9 14/21 and 6/18 42/21 and 6/9 14/21 and 18/9 14/63 and 6/9 14/21 and 6/27 70/21 and 6/9 14/21 and 30/9 14/21 and 6/45 98/21 and 6/9 14/21 and 42/9 14/21 and 6/63
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