如图，ABCD是6×8的长方形，AF长是4。求阴影部分的面积。（单位：分米）3q.Y:h1Y3K/O'~(V:L4c
3q.Y:h1Y3K/O'~(V:L4c
4h/X*\0w5Q.x)B;m3q.Y:h1Y3K/O'~(V:L4c
3q.Y:h1Y3K/O'~(V:L4c