Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/40 of 28/40?"
2140 × 2840 is 147400.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40×28/40 21/40×56/40 21/80×28/40 21/40×28/80 63/40×28/40 21/40×84/40
© everydaycalculation.com