Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 7/21 of 5/21?"
721 × 521 is 563.
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Related: 14/21×5/21 7/21×10/21 7/42×5/21 7/21×5/42 7/21×15/21 7/63×5/21 7/21×5/63 35/21×5/21 7/21×25/21 49/21×5/21 7/21×35/21
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