Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 11°C. We apply continuously 177°C heat to the field 8x1
What is the temperature (rounded to whole numbers) in the field 9x3 after 81 iterations according to the Gauss-Seidel iteration

Field in the beginning

11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111

Field after 4 iterations (rounded after 4th iteration)

23344719488844
34567143810227293
3578915336811058
4689101424395031
4689101217232616
478910111416159
468910111112106
36789910974
2466777653
1233444321

Temperature in field 9x3 after 81 iterations: