Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/56 of 21/30?"
2156 × 2130 is 2180.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56×21/30 21/56×42/30 21/56×21/60 63/56×21/30 21/56×63/30 21/56×21/90
© everydaycalculation.com