Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 10/70 of 21/63?"
1070 × 2163 is 121.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/70×21/63 10/70×42/63 30/70×21/63 50/70×21/63
© everydaycalculation.com