Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 34°C. We apply continuously 123°C heat to the field 9x3
What is the temperature (rounded to whole numbers) in the field 9x1 after 84 iterations according to the Gauss-Seidel iteration

Field in the beginning

34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434
34343434343434343434

Field after 4 iterations (rounded after 4th iteration)

58101111121110108
8141719202020212423
10172124252627344861
111924272830334680174
11202528303235435665
12202629313234373831
11202529303232322818
10182326272828262112
813171921212119148
47910111111974

Temperature in field 9x1 after 84 iterations: