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 160°C heat to the field 8x2
What is the temperature (rounded to whole numbers) in the field 9x8 after 108 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)

47910101014243320
7121517172033629952
915192123295110926192
101721242632487811360
10172225273140525835
10182326283034383621
10172225272930302615
9162023242526241910
712151718191917137
4689101010863

Temperature in field 9x8 after 108 iterations: