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 152°C heat to the field 3x4
What is the temperature (rounded to whole numbers) in the field 5x5 after 78 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)

5911131313131295
915212728262421158
11223854504135282010
153671116856045352412
19491142691297652392714
184482127966952392714
16355673675646372613
13263847474338312211
1018253031302723168
5912151515141184

Temperature in field 5x5 after 78 iterations: