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