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 63°C heat to the field 4x0
What is the temperature (rounded to whole numbers) in the field 0x0 after 150 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)

251130883214742
3713254027171173
4712182320161284
4711141716141284
4710121414131184
4710111213121184
479111112111084
4689101010963
3567787652
1234444321

Temperature in field 0x0 after 150 iterations: