Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 25°C. We apply continuously 117°C heat to the field 9x1
What is the temperature (rounded to whole numbers) in the field 6x8 after 147 iterations according to the Gauss-Seidel iteration

Field in the beginning

25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525

Field after 4 iterations (rounded after 4th iteration)

36788810173247
61012141515193266160
7121618192023314658
8141820212224273026
8151921222324242215
8151921232424231911
815192122232321169
813171920212018147
610131415161513105
3577888752

Temperature in field 6x8 after 147 iterations: