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 77°C heat to the field 7x4
What is the temperature (rounded to whole numbers) in the field 1x1 after 60 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)

3678888863
610121314141516127
7121517182025302312
8131719212843614019
81418202436651406226
8141821253349684522
8141820232836403116
7131618202326262111
59121415171717137
3567889863

Temperature in field 1x1 after 60 iterations: