Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 12°C. We apply continuously 121°C heat to the field 5x7
What is the temperature (rounded to whole numbers) in the field 6x5 after 72 iterations according to the Gauss-Seidel iteration

Field in the beginning

12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212

Field after 4 iterations (rounded after 4th iteration)

2334444431
3567777652
3688999863
47891011111074
479101316151395
4791323332820136
47112246795332188
471331781998541219
35112449825532177
136122332251694

Temperature in field 6x5 after 72 iterations: