Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 7°C. We apply continuously 187°C heat to the field 3x0
What is the temperature (rounded to whole numbers) in the field 3x8 after 109 iterations according to the Gauss-Seidel iteration

Field in the beginning

7777777777
7777777777
7777777777
7777777777
7777777777
7777777777
7777777777
7777777777
7777777777
7777777777

Field after 4 iterations (rounded after 4th iteration)

62581252853213631
724581036334181052
61733483926161063
4111925231813963
371215151311863
3681010109753
3568888752
2456676542
2344555431
1122222211

Temperature in field 3x8 after 109 iterations: