Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 40°C. We apply continuously 101°C heat to the field 3x4
What is the temperature (rounded to whole numbers) in the field 5x9 after 71 iterations according to the Gauss-Seidel iteration

Field in the beginning

40404040404040404040
40404040404040404040
40404040404040404040
40404040404040404040
40404040404040404040
40404040404040404040
40404040404040404040
40404040404040404040
40404040404040404040
40404040404040404040

Field after 4 iterations (rounded after 4th iteration)

6912131414141295
916212627262522168
12223546443934292111
14325889695342342413
174187191996448382714
17386697775948382714
16324861585144372613
13253542434137322311
1018242830292723168
5912141515141284

Temperature in field 5x9 after 71 iterations: