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1830 is equivalent to 610
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Related: 36/30 and 6/10 18/30 and 12/10 18/60 and 6/10 18/30 and 6/20 54/30 and 6/10 18/30 and 18/10 18/90 and 6/10 18/30 and 6/30 90/30 and 6/10 18/30 and 30/10 18/30 and 6/50 18/30 and 42/10 18/30 and 6/70
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