Solutions by everydaycalculation.com
1621 - 912 is 184.
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Related: 32/21-9/12 16/21-18/12 16/42-9/12 16/21-9/24 48/21-9/12 16/21-27/12 16/63-9/12 16/21-9/36 80/21-9/12 16/21-45/12 16/21-9/60 16/21-63/12 16/21-9/84
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