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 140°C heat to the field 3x7
What is the temperature (rounded to whole numbers) in the field 1x8 after 76 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
12202630323231282111
12223037383735312312
13254157534640332413
153568110825945352512
17441032471176847342311
13346710777523726178
71831433727201494

Temperature in field 1x8 after 76 iterations: