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 79°C heat to the field 9x7
What is the temperature (rounded to whole numbers) in the field 0x8 after 99 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
814182122222220158
9151922232423211711
9152022242424232319
9151922232425283642
81417202122243253112
6101315161719243240
35788910121413

Temperature in field 0x8 after 99 iterations: