Product page; moving description below picture instead of to the side

Greetings,

Right now, when I am on an individual product page, I see the description of the product to the right of the pictures of the product.

I would like the description to appear below the pictures.

How can I do that?

An example of my above issue is at: http://wp.technologyondemand.com/store/products/executive-summary-report/

Thanks!
Ed