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+28 into 20 best min fragment found: 20/3
+ Cut up 28 sticks of length 20 like this:
+ 8 x (28/3 + 32/3)
+ 8 x (8 + 12)
+ 12 x (20/3 + 20/3 + 20/3)
+ Reassemble as 20 sticks of length 28 like this:
+ 4 x (20/3 + 32/3 + 32/3)
+ 8 x (20/3 + 28/3 + 12)
+ 8 x (20/3 + 20/3 + 20/3 + 8)