Please learn to do it yourself instead of posting every question in your homework.
There are 70 green squares and 30 yellow squares, from a total of 100. Green 70/100=0.7 and yellow 30/100=0.3.
So, it is representing 0.7 x 0.3
The area where the green and yellow regions meet is colored light green. The number of squares in that area gives the answer to the multiplication problem. There are 21 squares there. So the answer is 0.21.