Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 26°C. We apply continuously 83°C heat to the field 9x6
What is the temperature (rounded to whole numbers) in the field 0x6 after 65 iterations according to the Gauss-Seidel iteration

Field in the beginning

26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626

Field after 4 iterations (rounded after 4th iteration)

4688999863
610131415151514105
813161819201917137
8141821222222201610
9151922232423232319
9152022242425293744
91519222324273557119
8141720212224293844
6101315161718202118
35788991097

Temperature in field 0x6 after 65 iterations: