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 172°C heat to the field 0x1
What is the temperature (rounded to whole numbers) in the field 5x4 after 80 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)

67442312743321
2299141211286532
785735211397642
3031241712108753
131716131198753
71011111098753
4789888753
3567777642
2445555432
1223333221

Temperature in field 5x4 after 80 iterations: