Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 35/42 of 10/21?"
3542 × 1021 is 2563.
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Related: 70/42×10/21 35/42×20/21 35/84×10/21 35/42×10/42 35/42×30/21 35/42×10/63 35/42×50/21 35/42×70/21
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