Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/70 of 21/60?"
2170 × 2160 is 21200.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70×21/60 21/70×42/60 63/70×21/60 21/70×63/60
© everydaycalculation.com