Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 12°C. We apply continuously 64°C heat to the field 8x4
What is the temperature (rounded to whole numbers) in the field 7x3 after 36 iterations according to the Gauss-Seidel iteration

Field in the beginning

12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212

Field after 4 iterations (rounded after 4th iteration)

2334444432
3567777775
36889910141711
4789101116284222
479101114224510638
47910111420324624
47910111316212314
468910111214138
3567789974
1234444432

Temperature in field 7x3 after 36 iterations: