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main.18.4
1
18 into 4: min fragment 2 [v1-66-g4e22cc3]
2
Cut up 18 sticks of length 4 like this:
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16 x (4)
4
2 x (2 + 2)
5
Reassemble as 4 sticks of length 18 like this:
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4 x (4 + 4 + 4 + 4 + 2)