Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 2/10 of 2/81?"
210 × 281 is 2405.
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Related: 4/10×2/81 2/10×4/81 2/20×2/81 6/10×2/81 2/10×6/81 2/30×2/81 2/10×10/81 2/50×2/81 14/10×2/81 2/10×14/81 2/70×2/81
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