Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/90 of 21/80?"
2090 × 2180 is 7120.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90×21/80 20/90×42/80 60/90×21/80 20/90×63/80
© everydaycalculation.com