13 into 2 best min fragment found: 1
  Cut up 13 sticks of length 2 like this:
    13 x (1 + 1)
  Reassemble as 2 sticks of length 13 like this:
    2 x (1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1)