Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 16/21 of 16/81?"
1621 × 1681 is 2561701.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21×16/81 16/21×32/81 16/42×16/81 48/21×16/81 16/21×48/81 16/63×16/81 80/21×16/81 16/21×80/81
© everydaycalculation.com