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 66°C heat to the field 8x7
What is the temperature (rounded to whole numbers) in the field 4x1 after 105 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
9151922232423221810
9152022242425282816
9151922232530405227
81417202124335611542
6101315161925364925
357891013171911

Temperature in field 4x1 after 105 iterations: