Explain how you can use a quick picture to find 3×2.7

If you want to find 3*2.7 with a picture, you could draw 2 rectangles divided into 10 parts shaded in and then the same rectangle with only 7 out of the 10 parts shaded in. Then do the same thing 2 more times. That should help. 

Ithink it’s b, hope this .