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 183°C heat to the field 3x8
What is the temperature (rounded to whole numbers) in the field 8x9 after 53 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
479111212111074
4712181816141184
41126433626181394
624611117342251594
103710728811753271584
72456101623317952

Temperature in field 8x9 after 53 iterations: