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 126°C heat to the field 2x8
What is the temperature (rounded to whole numbers) in the field 1x7 after 82 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
10182427282928251910
11202931313129262010
13304644383430261910
2153916747363024179
28812099350332519136
174275493019141073

Temperature in field 1x7 after 82 iterations: