Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 11°C. We apply continuously 90°C heat to the field 3x8
What is the temperature (rounded to whole numbers) in the field 3x1 after 123 iterations according to the Gauss-Seidel iteration

Field in the beginning

11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111

Field after 4 iterations (rounded after 4th iteration)

2334444321
3456676642
3578888763
4689999863
46810101010974
4710131313111074
4917252218141174
51434594025161173
620551456129161063
4132951321810632

Temperature in field 3x1 after 123 iterations: