Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/42 of 24/40?"
2142 × 2440 is 310.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42×48/40 21/84×24/40 21/42×24/80 63/42×24/40 21/42×72/40
© everydaycalculation.com