Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/50 of 42/84?"
2150 × 4284 is 21100.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50×42/84 63/50×42/84
© everydaycalculation.com