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 126°C heat to the field 6x4
What is the temperature (rounded to whole numbers) in the field 1x8 after 142 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)

1223333321
23445710963
24569182923147
3468194478502712
356123078204853816
35712255286573214
35610183041342211
246812172219147
2345710111184
1223455542

Temperature in field 1x8 after 142 iterations: