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 157°C heat to the field 6x3
What is the temperature (rounded to whole numbers) in the field 3x0 after 60 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)

23344710963
356711223528188
36811245597633415
4791638992561074920
4710163366109734118
471014244053442914
47912172430271910
4681013161817127
3567910111084
1234455542

Temperature in field 3x0 after 60 iterations: