Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 31°C. We apply continuously 130°C heat to the field 6x8
What is the temperature (rounded to whole numbers) in the field 1x0 after 143 iterations according to the Gauss-Seidel iteration

Field in the beginning

31313131313131313131
31313131313131313131
31313131313131313131
31313131313131313131
31313131313131313131
31313131313131313131
31313131313131313131
31313131313131313131
31313131313131313131
31313131313131313131

Field after 4 iterations (rounded after 4th iteration)

47910101110974
712151718181816126
915192223242321168
1017222526272623189
10182326282828261910
11182427283134312312
10182326314151432915
9162125376398673918
71216234291219944418
46914254879492611

Temperature in field 1x0 after 143 iterations: