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 77°C heat to the field 0x1
What is the temperature (rounded to whole numbers) in the field 1x2 after 67 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)

3325171210109863
10850302218171614105
4137302523212018137
2026262524242320158
1321242525252421168
1118222425252422169
916202324242421168
814182021222119147
610131516161614105
3578898752

Temperature in field 1x2 after 67 iterations: