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 103°C heat to the field 1x1
What is the temperature (rounded to whole numbers) in the field 1x3 after 99 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)

24523216953321
5215964291596432
3264442616107642
1629261914108642
91516141198652
591010987652
3678877642
3466666542
2344554431
1222222211

Temperature in field 1x3 after 99 iterations: