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 157°C heat to the field 2x5
What is the temperature (rounded to whole numbers) in the field 7x8 after 31 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
3467777642
38131412109863
72136312216121073
185297643823161184
30942541075229181384
2461106724427181384
153349423121151174
8172423191411853
471010976431

Temperature in field 7x8 after 31 iterations: