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 97°C heat to the field 6x7
What is the temperature (rounded to whole numbers) in the field 3x3 after 52 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
5811121313131295
59111313151716126
59111316233126179
591114234268462612
5810153067164713414
36812234369462611
234712202721136

Temperature in field 3x3 after 52 iterations: