Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 5°C. We apply continuously 83°C heat to the field 2x2
What is the temperature (rounded to whole numbers) in the field 5x1 after 64 iterations according to the Gauss-Seidel iteration

Field in the beginning

5555555555
5555555555
5555555555
5555555555
5555555555
5555555555
5555555555
5555555555
5555555555
5555555555

Field after 4 iterations (rounded after 4th iteration)

391512853211
926493218106421
15491335526148532
1232553722139642
818262216118642
51014131197542
3689876532
2456655431
1234443321
1122222111

Temperature in field 5x1 after 64 iterations: