Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/42 of 21/63?"
2142 × 2163 is 16.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42×42/63 21/84×21/63 63/42×21/63
© everydaycalculation.com