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 103°C heat to the field 9x3
What is the temperature (rounded to whole numbers) in the field 2x1 after 142 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)

4688999886
6101314151515161918
8131618192021273950
81418212223263766145
9151922232427344654
9152022242526293125
9151922232425252214
814172021222220169
610131516161614116
3578898753

Temperature in field 2x1 after 142 iterations: