Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/42 of 16/54?"
2142 × 1654 is 427.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42×32/54 21/84×16/54 63/42×16/54 21/42×48/54 21/42×80/54
© everydaycalculation.com