Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/70 of 12/90?"
1270 × 1290 is 4175.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/70×12/90 12/70×24/90 36/70×12/90 12/70×36/90 60/70×12/90 12/70×60/90 84/70×12/90 12/70×84/90
© everydaycalculation.com