Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 19°C. We apply continuously 153°C heat to the field 5x7
What is the temperature (rounded to whole numbers) in the field 0x0 after 41 iterations according to the Gauss-Seidel iteration

Field in the beginning

19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919

Field after 4 iterations (rounded after 4th iteration)

3456666642
489111111111074
59121314141413105
611131516171715116
611141619232319147
611142032453928189
61117316210471432511
6111942101255111552812
4815326510672422310
2481730423322126

Temperature in field 0x0 after 41 iterations: