Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 13°C. We apply continuously 152°C heat to the field 7x6
What is the temperature (rounded to whole numbers) in the field 0x0 after 48 iterations according to the Gauss-Seidel iteration

Field in the beginning

13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313

Field after 4 iterations (rounded after 4th iteration)

2344444432
3567888753
4689101010974
4791011111316137
481011121526382915
481011142756966128
48101218399724810139
479111632641046631
3578122135473619
23346101619169

Temperature in field 0x0 after 48 iterations: