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 148°C heat to the field 3x6
What is the temperature (rounded to whole numbers) in the field 5x7 after 42 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
712161819201917137
814202627252320158
818334843352923168
11296210575503626189
1441102252115634028199
13346911180533626178
922395447362619126
51118232218141063

Temperature in field 5x7 after 42 iterations: