Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/40 of 18/63?"
2140 × 1863 is 320.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40×18/63 21/40×36/63 21/80×18/63 63/40×18/63 21/40×54/63 21/40×90/63
© everydaycalculation.com