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 168°C heat to the field 2x5
What is the temperature (rounded to whole numbers) in the field 4x7 after 142 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)

3678888863
610131515151513105
715222423212017137
1230484335292420158
24631138053372923168
3710928112668443225179
30731238959413124179
2043625543342721157
1224323228242016115
5111415141210853

Temperature in field 4x7 after 142 iterations: