Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/70 of 4/7?"
2170 × 47 is 635.
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Related: 42/70×4/7 21/70×8/7 21/70×4/14 63/70×4/7 21/70×12/7 21/70×4/21 21/70×20/7 21/70×4/35 21/70×28/7 21/70×4/49
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