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 84°C heat to the field 1x7
What is the temperature (rounded to whole numbers) in the field 9x8 after 99 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
12212630313231282111
14253133343433302312
20374039373635312312
34685746403735312312
531487650403532272010
3264513831272420147
142624201715131074

Temperature in field 9x8 after 99 iterations: