Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 9°C. We apply continuously 79°C heat to the field 8x0
What is the temperature (rounded to whole numbers) in the field 3x8 after 43 iterations according to the Gauss-Seidel iteration

Field in the beginning

9999999999
9999999999
9999999999
9999999999
9999999999
9999999999
9999999999
9999999999
9999999999
9999999999

Field after 4 iterations (rounded after 4th iteration)

123335133610632
24456814274422
34667912182213
3567891113138
35788991095
3578899974
3578888863
3567777753
2455565542
1223333221

Temperature in field 3x8 after 43 iterations: