Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 19°C. We apply continuously 181°C heat to the field 3x4
What is the temperature (rounded to whole numbers) in the field 7x0 after 42 iterations according to the Gauss-Seidel iteration

Field in the beginning

19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919
19191919191919191919

Field after 4 iterations (rounded after 4th iteration)

3457777642
4812181816131184
514294640292216116
9286611780493121147
1344116299130663925168
13377812990573725168
1126476556433123158
817283635302419136
51116202119171394
35891098742

Temperature in field 7x0 after 42 iterations: