Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/84 of 21/81?"
2184 × 2181 is 7108.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84×21/81 21/84×42/81 63/84×21/81 21/84×63/81
© everydaycalculation.com