Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 9/21 of 81/90?"
921 × 8190 is 2770.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21×81/90 9/42×81/90 27/21×81/90 9/63×81/90 45/21×81/90 63/21×81/90
© everydaycalculation.com