(Read my newer post here before using this method...)
Funny, on my very first post in Blogger I struggled getting the code to display. Want a real easy, non fancy way of getting it to display? Convert your html to html safe code. Here's a really nice site for this:
If you want all tags converted then ensure to select the "Convert Tags" or "Convert and Colourize Tags" option.
Edit: Have noticed the above link is not working anymore... will post an update when I find another nice site :)