Solutions by everydaycalculation.com
1st number: 21/42, 2nd number: 4 0/21
This multiplication involving fractions can also be rephrased as "What is 21/42 of 4 0/21?"
2142 × 8421 is 21.
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Related: 21/84×84/21 21/42×84/42 63/42×84/21 21/42×84/63
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