Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/60 of 12/70?"
2160 × 1270 is 350.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60×12/70 21/60×24/70 63/60×12/70 21/60×36/70 21/60×60/70 21/60×84/70
© everydaycalculation.com