You have to create a new module position in index.php of template and reconfigure modules width and floating etc. in template.css.
Some knowledge in Joomla / PHP is required for that.
You can also try to use conditional states later if u are able to understand the basics of Joomla modules. (for example if no right / left modules activated than the content container should habe 100% width, if left modules are present than left should have width 33% with float left and content container 66% with margin-left: 20px for example etc.)
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