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 81°C heat to the field 8x3
What is the temperature (rounded to whole numbers) in the field 6x2 after 116 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)

4688999996
6101314151517212415
8131618192127415830
81418212226366513951
9151922242735496434
9152022242631363721
9151922232527282414
8141720212223221710
610131516171615116
3578898763

Temperature in field 6x2 after 116 iterations: