Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 40/81 of 4/10?"
4081 × 410 is 1681.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/81×4/10 40/81×8/10 40/81×4/20 40/81×12/10 40/81×4/30 40/81×20/10 40/81×4/50 40/81×28/10 40/81×4/70
© everydaycalculation.com