Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/64 of 3/9?"
2164 × 39 is 764.
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Related: 42/64×3/9 21/64×6/9 21/64×3/18 63/64×3/9 21/64×3/27 21/64×15/9 21/64×3/45 21/64×21/9 21/64×3/63
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