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 172°C heat to the field 2x0
What is the temperature (rounded to whole numbers) in the field 5x9 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)

247823784361913973
24601046942282116116
1839564938302420147
1427363633292622168
1121273029282622179
1018232627272522179
916212425252422168
814182022222219147
610131516171614105
3578898752

Temperature in field 5x9 after 89 iterations: