Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/60 of 5/81?"
2160 × 581 is 7324.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60×5/81 21/60×10/81 63/60×5/81 21/60×15/81 21/60×25/81 21/60×35/81
© everydaycalculation.com