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 179°C heat to the field 4x5
What is the temperature (rounded to whole numbers) in the field 4x9 after 54 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)

1223333221
2344565532
2458131310853
3410233932221484
372359108704022125
312381082871195628146
4113170119794626146
39203855453120115
2612202624191384
135911119642

Temperature in field 4x9 after 54 iterations: