I have one question regarding the HTML tables that I couldn't manage to find myself.
Is it possible to create this layout using HTML and inline css within one table?

I tried to merge my cells in 4th row (I've started with 3 column layout) because I need 2 cells, and if my table width is 640px, and I force 320px for both cells, whole table gets messed up.
EDIT: 4th row is the issue, I need 2 equal width cells in it.
Thanks in advance.