Solutions by everydaycalculation.com
1st number: 21 0/2, 2nd number: 4/21
This multiplication involving fractions can also be rephrased as "What is 42/2 of 4/21?"
422 × 421 is 41.
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Related: 84/2×4/21 42/2×8/21 42/4×4/21 42/2×4/42 42/2×12/21 42/6×4/21 42/2×4/63 42/2×20/21 42/10×4/21 42/2×28/21 42/14×4/21
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