Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 39°C. We apply continuously 79°C heat to the field 5x0
What is the temperature (rounded to whole numbers) in the field 7x8 after 99 iterations according to the Gauss-Seidel iteration

Field in the beginning

39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939

Field after 4 iterations (rounded after 4th iteration)

591422461194824146
9162231466548332110
11202633414843352412
12222834394240352513
13232934373939342613
13233034373838342513
13232933353736322413
12202630323332282111
915202224252421158
5810121313121074

Temperature in field 7x8 after 99 iterations: