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 65°C heat to the field 2x7
What is the temperature (rounded to whole numbers) in the field 3x1 after 149 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
10192628292928251910
12253536343230262010
16376049403431261910
20531226442332924179
1534554332262218126
8162321171412963

Temperature in field 3x1 after 149 iterations: