Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 18/21 of 18/63?"
1821 × 1863 is 1249.
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Related: 36/21×18/63 18/21×36/63 18/42×18/63 54/21×18/63 18/21×54/63 18/63×18/63 90/21×18/63 18/21×90/63
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