Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 30°C. We apply continuously 109°C heat to the field 3x4
What is the temperature (rounded to whole numbers) in the field 1x0 after 99 iterations according to the Gauss-Seidel iteration

Field in the beginning

30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030

Field after 4 iterations (rounded after 4th iteration)

47910111110974
712172122201916126
917294138322722168
11275385634535271910
143784196955740302111
14336194715240312111
13264255514336292010
1020293636333025179
714192324232118126
471011121211963

Temperature in field 1x0 after 99 iterations: