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 192°C heat to the field 2x5
What is the temperature (rounded to whole numbers) in the field 4x4 after 30 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)

6912131314131295
916212324242321168
12233335343331272011
17416359494237322312
3179138101705343352613
46131330154886047382714
3890149111785846372613
26557872594840332311
1631434339342924178
81519211918151284

Temperature in field 4x4 after 30 iterations: