Tamika is restoring an antique storage chest that is in shape of a rectangular prism. She is painting the outside only of the trunk. The trunk is 4 feet long, 18 inches wide, and 2 feet tall. There is a brass ornament on the outside of the trunk that takes up an area of 1 square of the trunk that takes up an area of 1 square does she need, in square feet, to cover the outside of the trunk?