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 81°C heat to the field 3x0
What is the temperature (rounded to whole numbers) in the field 9x8 after 55 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)

3123711139167431
4132747301711742
4101824201511853
471215141210853
3691111109853
3579998753
3567888753
2466777642
2345555432
1222333221

Temperature in field 9x8 after 55 iterations: