[Plugin: Yoasts Breadcrumbs]: where to insert code?

Hi,

This plugin is just what I need. However, the installation instructions tell me to insert the following code in my theme’s template:

<?php if ( function_exists(‘yoast_breadcrumb’) ) {
yoast_breadcrumb(‘<p id=”breadcrumbs”>’,'</p>’);
} ?>

I am not sure on what page and where exactly on that page I should add the above code. I am using the Atahualpa theme.

I am still very new to WordPress and would appreciate if any responses could be as specific as possible, i.e., what file in my template, and which line?

Many thanks!