Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 8°C. We apply continuously 108°C heat to the field 9x2
What is the temperature (rounded to whole numbers) in the field 4x2 after 79 iterations according to the Gauss-Seidel iteration

Field in the beginning

8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888

Field after 4 iterations (rounded after 4th iteration)

122333351114
2344556143047
245666102358146
34667711203650
35677810142020
356778910129
3567778885
2456677653
2345555532
1222333221

Temperature in field 4x2 after 79 iterations: