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 128°C heat to the field 0x2
What is the temperature (rounded to whole numbers) in the field 8x7 after 56 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)

1717129765532
5743271813119863
1757539241714121084
614933241816141295
252925211816151395
1318191817161513105
81315151515141295
61012131313131184
478910109863
2345555431

Temperature in field 8x7 after 56 iterations: