Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 34°C. We apply continuously 142°C heat to the field 6x5
What is the temperature (rounded to whole numbers) in the field 1x3 after 57 iterations according to the Gauss-Seidel iteration

Field in the beginning

34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434

Field after 4 iterations (rounded after 4th iteration)

5810111112111084
814171920202018147
10172124252831282111
11192427324354463116
112025314472110774622
12202635571122531175926
112026345081119855124
10182329395466553718
8131721273337332312
4791113161715116

Temperature in field 1x3 after 57 iterations: