Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/75 of 21/60?"
2175 × 2160 is 49500.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75×21/60 21/75×42/60 63/75×21/60 21/75×63/60
© everydaycalculation.com