Total Volume of All Boxes

Given a list of boxes, create a function that returns the total volume of all those boxes combined together. A box is represented by a list with three elements: length, width and height.

For instance, total_volume([2, 3, 2], [6, 6, 7], [1, 2, 1]) should return 266 since (2 x 3 x 2) + (6 x 6 x 7) + (1 x 2 x 1) = 12 + 252 + 2 = 266.

Examples