Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/90 of 6/63?"
2190 × 663 is 145.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90×6/63 21/90×12/63 63/90×6/63 21/90×18/63 21/90×30/63 21/90×42/63
© everydaycalculation.com