Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 6/21 of 6/81?"
621 × 681 is 4189.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21×6/81 6/21×12/81 6/42×6/81 18/21×6/81 6/21×18/81 6/63×6/81 30/21×6/81 6/21×30/81 42/21×6/81 6/21×42/81
© everydaycalculation.com