1 layer at (0,0) size 800x600
2 RenderView at (0,0) size 800x600
3 layer at (0,0) size 800x600
4 RenderBlock {HTML} at (0,0) size 800x600
5 RenderBody {BODY} at (8,8) size 784x584
6 RenderInline {SPAN} at (0,0) size 265x18
7 RenderText {#text} at (196,0) size 265x18
8 text run at (196,0) width 265: "This span has 25% margins on either side."
9 RenderText {#text} at (657,0) size 30x18
10 text run at (657,0) width 30: "See?"