Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/60 of 3/10?"
2160 × 310 is 21200.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60×3/10 21/60×6/10 21/60×3/20 63/60×3/10 21/60×9/10 21/60×3/30 21/60×15/10 21/60×3/50 21/60×21/10 21/60×3/70
© everydaycalculation.com