Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 18/21 of 18/20?"
1821 × 1820 is 2735.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21×18/20 18/21×36/20 18/42×18/20 18/21×18/40 54/21×18/20 18/21×54/20 18/63×18/20 18/21×18/60 90/21×18/20 18/21×90/20
© everydaycalculation.com