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 63°C heat to the field 9x6
What is the temperature (rounded to whole numbers) in the field 7x6 after 50 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
4689999875
4689101010101212
4789101011152330
4689101012193888
36789911162431
2466778101312
1233444564

Temperature in field 7x6 after 50 iterations: