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 120°C heat to the field 0x6
What is the temperature (rounded to whole numbers) in the field 3x1 after 143 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)

4688999863
610131415151514105
814171919201917137
1218212223232220158
2429282625252421168
6050383128262522169
16979473429262522168
6152393126242219147
2529262220181714105
913131210109753

Temperature in field 3x1 after 143 iterations: