1 21 into 10 best min fragment found: 21/5
2 Cut up 21 sticks of length 10 like this:
8 Reassemble as 10 sticks of length 21 like this:
9 2 x (5 + 5 + 27/5 + 28/5)
10 2 x (5 + 5 + 26/5 + 29/5)
11 2 x (23/5 + 24/5 + 29/5 + 29/5)
12 2 x (22/5 + 5 + 29/5 + 29/5)
13 2 x (21/5 + 21/5 + 21/5 + 21/5 + 21/5)