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 129°C heat to the field 0x0
What is the temperature (rounded to whole numbers) in the field 7x1 after 142 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)

156542212865532
5439241612109863
222421171413121084
121617161514131295
81214151515141295
61013141515141395
5912131414141295
5810121213121184
3689999863
2345555431

Temperature in field 7x1 after 142 iterations: