Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 29°C. We apply continuously 183°C heat to the field 5x7
What is the temperature (rounded to whole numbers) in the field 8x2 after 139 iterations according to the Gauss-Seidel iteration

Field in the beginning

29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929

Field after 4 iterations (rounded after 4th iteration)

4789101010973
712141617171715116
814182022222219158
916202324262523179
10172224293433282010
10172229446052392613
101724427913091573315
9162755126310137703716
71221428113189533013
37122238524228167

Temperature in field 8x2 after 139 iterations: