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 186°C heat to the field 3x2
What is the temperature (rounded to whole numbers) in the field 6x3 after 89 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)

41024393222151174
9286711880483120136
1546121309135704127178
154084136976342291910
13305372644938292010
11233645443933271910
1019263233322924189
815202425252420157
611141718181715105
3678999753

Temperature in field 6x3 after 89 iterations: