Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 4/21 of 18/21?"
421 × 1821 is 849.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21×18/21 4/21×36/21 4/42×18/21 4/21×18/42 12/21×18/21 4/21×54/21 4/63×18/21 4/21×18/63 20/21×18/21 4/21×90/21 28/21×18/21
© everydaycalculation.com