newbie in Visio

[mla]

Hi guys, I did some schemas during last decade and it looked not bad.
I spent a lot of time because didn't have enough experience.
With all intuitive things VISIO offers I am still confused now...
I need to create a very basic schema that will include
2 department (let say i will drag two big squares.



3 offices in each dep. (I will insert 3 squares in each DEP square)

then I have to insert 1 pc in each office

and finally show the host server and show that whole network is on 1 Gb.

Sure I can do some primitive schema.

Now, I want to ask may be there is a stencil for an office with comp - nice one .

Sorry, if the question seems to be stupid .

Thx.