Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/70 of 3/10?"
2170 × 310 is 9100.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70×3/10 21/70×6/10 21/70×3/20 63/70×3/10 21/70×9/10 21/70×3/30 21/70×15/10 21/70×3/50 21/70×21/10 21/70×3/70
© everydaycalculation.com