OK, after your phone call, I got your idea. You want to show only "part" (the first line) of those names of cities, and other names only can be seen by scroll down that small scrollbar.
This is very simple to implement by CSS:
Since your cities were input via Custom HTML module, so it is possible to assign unique CSS ID to that paragraph. For example, I surrounded your cities names with a DIV which id=cities. Then, add following CSS to your template.css file:
EasyCalcCheck Plus - Warning: The form was not found, because the template uses overrides. Please adjust the search string for the form in the file easycalccheckplus.php or delete the overrides in templates/yourtemplate/html!