23 into 18 best min fragment found: 19/3
  Cut up 23 sticks of length 18 like this:
    1 x (9 + 9)
    2 x (25/3 + 29/3)
    2 x (8 + 10)
    2 x (23/3 + 31/3)
    8 x (20/3 + 34/3)
    8 x (19/3 + 35/3)
  Reassemble as 18 sticks of length 23 like this:
    8 x (34/3 + 35/3)
    2 x (20/3 + 8 + 25/3)
    2 x (20/3 + 20/3 + 29/3)
    2 x (19/3 + 23/3 + 9)
    2 x (19/3 + 20/3 + 10)
    2 x (19/3 + 19/3 + 31/3)