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 170°C heat to the field 3x1
What is the temperature (rounded to whole numbers) in the field 0x2 after 69 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)

4164687522613742
9339726610647231263
828641107342231484
71836524330201384
51220272520151174
481316161412973
36911111110863
3578888752
2345665532
1223333221

Temperature in field 0x2 after 69 iterations: