Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/70 of 1/40?"
2170 × 140 is 3400.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70×1/40 21/70×2/40 21/70×1/80 63/70×1/40 21/70×3/40 21/70×5/40 21/70×7/40
© everydaycalculation.com