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 89°C heat to the field 8x3
What is the temperature (rounded to whole numbers) in the field 6x9 after 102 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
6101314151517222616
8131618192128436233
81418212226386915255
9151922242736526937
9152022242731373923
9151922242527282515
8141720212223221810
610131516171715126
3578898763

Temperature in field 6x9 after 102 iterations: