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689241 I would say! ;)

6894 it is

I mean asking for the total value i.e., 6+8+2+4=20 ans

your example was wrong calulated 6+8+2+4=20 not 30 ;)

My solution:
6+8+3+9+2+4+1= 33

If i rotate 90°, then there was a ∞, so an other solution is ∞

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