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 116°C heat to the field 7x8
What is the temperature (rounded to whole numbers) in the field 4x7 after 149 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
13233034363636332513
14243034363739382916
13233034364047534021
12212730344466936128
91620232945881998433
581113172746724419

Temperature in field 4x7 after 149 iterations: