Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/30 of 30/40?"
2130 × 3040 is 2140.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30×30/40 21/30×60/40 21/60×30/40 21/30×30/80 63/30×30/40 21/30×90/40 21/90×30/40
© everydaycalculation.com