Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/80 of 21/70?"
2180 × 2170 is 63800.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80×21/70 21/80×42/70 63/80×21/70 21/80×63/70
© everydaycalculation.com