Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/36 of 21/35?"
2136 × 2135 is 720.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36×21/35 21/36×42/35 21/72×21/35 21/36×21/70 63/36×21/35 21/36×63/35
© everydaycalculation.com