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 83°C heat to the field 7x6
What is the temperature (rounded to whole numbers) in the field 5x6 after 137 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)

2445555532
4678999863
479111111111084
58111213131415126
591113131621272111
591113152238593818
5911131729601426024
581012152441624019
3689111624302312
2345681113105

Temperature in field 5x6 after 137 iterations: