Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/30 of 21/90?"
2130 × 2190 is 49300.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30×21/90 21/30×42/90 21/60×21/90 63/30×21/90 21/30×63/90 21/90×21/90
© everydaycalculation.com