Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 5°C. We apply continuously 129°C heat to the field 0x4
What is the temperature (rounded to whole numbers) in the field 4x7 after 145 iterations according to the Gauss-Seidel iteration

Field in the beginning

5555555555
5555555555
5555555555
5555555555
5555555555
5555555555
5555555555
5555555555
5555555555
5555555555

Field after 4 iterations (rounded after 4th iteration)

1222222211
5654433321
1817128654431
56402414965432
1747134181176532
594427161076532
22231813976532
912119765431
4666544321
2333222111

Temperature in field 4x7 after 145 iterations: