28 into 13 best min fragment found: 28/5
  Cut up 28 sticks of length 13 like this:
    1 x (32/5 + 33/5)
    1 x (6 + 7)
    6 x (29/5 + 36/5)
    20 x (28/5 + 37/5)
  Reassemble as 13 sticks of length 28 like this:
    1 x (33/5 + 7 + 36/5 + 36/5)
    1 x (32/5 + 36/5 + 36/5 + 36/5)
    1 x (6 + 36/5 + 37/5 + 37/5)
    6 x (29/5 + 37/5 + 37/5 + 37/5)
    4 x (28/5 + 28/5 + 28/5 + 28/5 + 28/5)