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 191°C heat to the field 5x8
What is the temperature (rounded to whole numbers) in the field 8x5 after 80 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
916202223242321168
12202528303030272011
13222832343434302312
13233034363737332513
14243034394544382814
13233038547163483216
122130498814099623717
9162856129319139693515
591734681147341219

Temperature in field 8x5 after 80 iterations: