Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 15°C. We apply continuously 86°C heat to the field 2x0
What is the temperature (rounded to whole numbers) in the field 9x7 after 93 iterations according to the Gauss-Seidel iteration

Field in the beginning

15151515151515151515
15151515151515151515
15151515151515151515
15151515151515151515
15151515151515151515
15151515151515151515
15151515151515151515
15151515151515151515
15151515151515151515
15151515151515151515

Field after 4 iterations (rounded after 4th iteration)

12401194319107542
12315335221511963
102129262016141184
81519201816141295
61215161616151395
610131515151513105
5912131414141295
5810121213121184
36899109863
2345555431

Temperature in field 9x7 after 93 iterations: