Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 42/50 of 5/7?"
4250 × 57 is 35.
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Related: 84/50×5/7 42/50×10/7 42/50×5/14 42/50×15/7 42/50×5/21 42/50×25/7 42/50×5/35 42/50×35/7 42/50×5/49
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