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 128°C heat to the field 1x6
What is the temperature (rounded to whole numbers) in the field 0x0 after 149 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
11202528293029262010
14273234343433302212
24454743403836322413
46937456464138332513
7722010867504338332412
49977657453935292111
2647463933292622158
122021201716141184

Temperature in field 0x0 after 149 iterations: