Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 38°C. We apply continuously 112°C heat to the field 8x5
What is the temperature (rounded to whole numbers) in the field 4x9 after 123 iterations according to the Gauss-Seidel iteration

Field in the beginning

38383838383838383838
38383838383838383838
38383838383838383838
38383838383838383838
38383838383838383838
38383838383838383838
38383838383838383838
38383838383838383838
38383838383838383838
38383838383838383838

Field after 4 iterations (rounded after 4th iteration)

5911121313131194
915192122232220158
11192427282928272414
12212730323335394124
13222832343645638545
132329333540559419672
13222832353950709047
11202529313440474828
9151922232528292615
48101112131414127

Temperature in field 4x9 after 123 iterations: