What product does the diagram show?

a- 1/8*5/8=5/64
b- 1/2*1/8=1/16
c- 1/2*1/4=1/8
d- 1/4*5/8=5/32

4 out of 8 rectangles are crosshatched up to the right.
This is 4/8 = 1/2

2 out of 8 rectangles are crosshatched up to the left.
This is 2/8 = 1/4

One rectangle is crosshatched both ways.
This is 1/8

The operation is
1/2 * 1/4 = 1/8