Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 24°C. We apply continuously 104°C heat to the field 9x6
What is the temperature (rounded to whole numbers) in the field 5x9 after 70 iterations according to the Gauss-Seidel iteration

Field in the beginning

24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424

Field after 4 iterations (rounded after 4th iteration)

3678888753
61012131414141395
712151718181816127
8131719202120181510
8141820212222222421
8141821222224294152
81418202223263766146
7131618192023304352
591214151517202321
356788910108

Temperature in field 5x9 after 70 iterations: