Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 39°C. We apply continuously 146°C heat to the field 6x8
What is the temperature (rounded to whole numbers) in the field 2x1 after 115 iterations according to the Gauss-Seidel iteration

Field in the beginning

39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939

Field after 4 iterations (rounded after 4th iteration)

5911121313131295
915192223232320158
11192527293029262010
12222731333333302212
13232933353636322413
13233033363942382815
13232933385062523618
122026324575113794621
9152028491052481085121
581116295590573013

Temperature in field 2x1 after 115 iterations: