Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 20°C. We apply continuously 134°C heat to the field 5x7
What is the temperature (rounded to whole numbers) in the field 6x8 after 64 iterations according to the Gauss-Seidel iteration

Field in the beginning

20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020

Field after 4 iterations (rounded after 4th iteration)

3566777652
5810111212121084
610131415151513105
611141617181816126
712151720242319147
712152031433728189
7121730579465402411
611193992226100502612
59153059956538219
2581627383020125

Temperature in field 6x8 after 64 iterations: