Regina has two electronic files when i was a size of 3.15 envy and the other has a size of 4.89 embee what is the best estimate of the total size of the two electronic files

Kristen is wrapping presents for the holidays. she has a box that measures 4 ft. x 2 ft. x 2 ft. how many square feet of wrapping paper does she need to cover the box without overlapping?