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 76°C heat to the field 2x4
What is the temperature (rounded to whole numbers) in the field 1x6 after 76 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)

2334444331
3699887642
5132118141210863
102850352316121073
1649127573019141174
133356402719141184
92029262016131074
6121617151311963
479101098752
2345554321

Temperature in field 1x6 after 76 iterations: