Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/40 of 28/70?"
2140 × 2870 is 21100.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40×28/70 21/40×56/70 21/80×28/70 63/40×28/70 21/40×84/70
© everydaycalculation.com