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 199°C heat to the field 7x1
What is the temperature (rounded to whole numbers) in the field 3x1 after 143 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)

2334721541025925
3457144211631212245
35791636771298237
4689142645614724
46810121827322715
4781011141819169
468910121313116
3678910101084
2466777753
1233444321

Temperature in field 3x1 after 143 iterations: