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 196°C heat to the field 6x8
What is the temperature (rounded to whole numbers) in the field 5x7 after 146 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
46891010111074
478910131816126
4689142945362311
367112866119764017
24614411153081235320
124102661107653213

Temperature in field 5x7 after 146 iterations: