Solutions by everydaycalculation.com
1st number: 4 2/10, 2nd number: 15/21
This multiplication involving fractions can also be rephrased as "What is 42/10 of 15/21?"
4210 × 1521 is 31.
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Related: 84/10×15/21 42/10×30/21 42/20×15/21 42/10×15/42 42/10×45/21 42/30×15/21 42/10×15/63 42/10×75/21 42/50×15/21 42/70×15/21
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