Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 8°C. We apply continuously 193°C heat to the field 6x6
What is the temperature (rounded to whole numbers) in the field 3x6 after 129 iterations according to the Gauss-Seidel iteration

Field in the beginning

8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888

Field after 4 iterations (rounded after 4th iteration)

1223333221
2344555432
2456667653
3466710141395
3567122642342110
356102664116754017
35714421163091275623
246133475127834520
2359214056452814
123510172320147

Temperature in field 3x6 after 129 iterations: