Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 21°C. We apply continuously 192°C heat to the field 7x1
What is the temperature (rounded to whole numbers) in the field 3x4 after 80 iterations according to the Gauss-Seidel iteration

Field in the beginning

21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121

Field after 4 iterations (rounded after 4th iteration)

35671024561016026
581012204611830612146
61013162343821328439
7121517223452675127
7121618212735393218
7121618202327272212
712161819212221179
611141617181817137
5811121313131295
2466777642

Temperature in field 3x4 after 80 iterations: