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 107°C heat to the field 1x4
What is the temperature (rounded to whole numbers) in the field 6x1 after 85 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)

3566776642
61213131212111084
1528272219171513105
3369503425201815116
59176804430231916126
3875563929232017126
2138363025221916126
1221242220191714105
71215151414131174
3677776542

Temperature in field 6x1 after 85 iterations: