Solutions by everydaycalculation.com
1st number: 5 0/4, 2nd number: 1/21
This multiplication involving fractions can also be rephrased as "What is 20/4 of 1/21?"
204 × 121 is 521.
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Related: 40/4×1/21 20/4×2/21 20/8×1/21 20/4×1/42 60/4×1/21 20/4×3/21 20/12×1/21 20/4×1/63 20/4×5/21 20/4×7/21 20/28×1/21
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