Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 37°C. We apply continuously 168°C heat to the field 9x6
What is the temperature (rounded to whole numbers) in the field 5x9 after 144 iterations according to the Gauss-Seidel iteration

Field in the beginning

37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737

Field after 4 iterations (rounded after 4th iteration)

5911121213121184
915182022222219158
11182326272828251910
12202629313231282416
12222731333433343733
13222832343537466683
1222283133354058106236
11192528303136486884
8151921232426323733
481011121214151612

Temperature in field 5x9 after 144 iterations: