Simon takes a wild guess, and then makes a mess
Here's a description of the contestant's attempt. Someone's probably working on collecting some images to illustrate it.
Without removing any of the balls, Simon attempts to perform cubic multiplication to come up with an answer, and somehow arrives at an estimate of 710. He then tips up the basket, spilling its contents all over the floor, and leaves the mess for Mark to tidy up. After the disqualification of three of his competitors, and Julie's apparent win, it appears that he has miraculously achieved second place. However, after it is revealed that Julie is also disqualified, he becomes the winner of the task, having been the only person to complete it while remaining within the rules.
(Written by Karl Craven)