Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/21 of 10/15?"
2021 × 1015 is 4063.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21×10/15 20/21×20/15 20/42×10/15 20/21×10/30 60/21×10/15 20/21×30/15 20/63×10/15 20/21×10/45 20/21×50/15 20/21×10/75 20/21×70/15
© everydaycalculation.com