Solutions by everydaycalculation.com
821 - 112 is 2584.
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Related: 16/21-1/12 8/21-2/12 8/42-1/12 8/21-1/24 24/21-1/12 8/21-3/12 8/63-1/12 8/21-1/36 40/21-1/12 8/21-5/12 8/21-1/60 56/21-1/12 8/21-7/12 8/21-1/84
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