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 197°C heat to the field 2x7
What is the temperature (rounded to whole numbers) in the field 4x5 after 68 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
610121415151513105
712161819191917137
814182122222119147
818262827252421158
1334544939322722168
26721299058403024178
4012332414173443122157
30771339156362517115
15355243292014963

Temperature in field 4x5 after 68 iterations: