Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/24 of 21/42?"
2124 × 2142 is 716.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24×21/42 21/48×21/42 21/24×21/84 63/24×21/42 21/24×63/42 21/72×21/42
© everydaycalculation.com