Torsten Wagner <torsten.wagner@gmail.com> writes:

>     Perhaps this will do what you want?  When I run org-babel-tangle on the following org file, and then
>     LaTeX the output, the resulting pdf file says: A bit of LATEX code, with the result: 6

> I just wonder if there is a more comfortable method rather then
> creating a file.

Although I still don't fully understand the need to embed latex *inside*
of source-code blocks, perhaps the attached org-babel-latex.el file [1]
will represent a simpler solution for embedding the results of
source-code blocks in latex source-code blocks.  It makes use of
the :var org-babel header argument as shown in the attached example file
[2].  To reproduce first load org-babel-latex.el and then evaluate the
latex block (note the results are already in the file from my test
evaluation).

Hope this helps -- Eric

Footnotes: 
[1]