Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 3/15 of 3/21?"
315 × 321 is 135.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15×3/21 3/15×6/21 3/30×3/21 3/15×3/42 9/15×3/21 3/15×9/21 3/45×3/21 3/15×3/63 3/15×15/21 3/75×3/21 21/15×3/21
© everydaycalculation.com