Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 12°C. We apply continuously 169°C heat to the field 9x7
What is the temperature (rounded to whole numbers) in the field 4x6 after 144 iterations according to the Gauss-Seidel iteration

Field in the beginning

12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212

Field after 4 iterations (rounded after 4th iteration)

2334444431
3567777652
3688999863
4789101010974
4791011111110109
47910111111142225
47910111114255075
46891011163790229
35677813285376
1234457142325

Temperature in field 4x6 after 144 iterations: