Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 1/3 of 20/21?"
13 × 2021 is 2063.
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Related: 2/3×20/21 1/3×40/21 1/6×20/21 1/3×20/42 1/3×60/21 1/9×20/21 1/3×20/63 5/3×20/21 1/15×20/21 7/3×20/21 1/21×20/21
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