7 into 5: min fragment 5/3   [v1-66-g4e22cc3]
  Cut up 7 sticks of length 5 like this:
    1 x (5)
    1 x (10/3 + 5/3)
    2 x (3 + 2)
    2 x (8/3 + 7/3)
    1 x (5/3 + 5/3 + 5/3)
  Reassemble as 5 sticks of length 7 like this:
    1 x (5 + 2)
    1 x (10/3 + 2 + 5/3)
    2 x (3 + 7/3 + 5/3)
    1 x (8/3 + 8/3 + 5/3)