Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 8°C. We apply continuously 131°C heat to the field 7x0
What is the temperature (rounded to whole numbers) in the field 8x4 after 59 iterations according to the Gauss-Seidel iteration

Field in the beginning

8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888

Field after 4 iterations (rounded after 4th iteration)

1223719581775919
234592043734419
245691626352713
34678121720169
35678101213106
3567899984
3567788863
2456777652
2345555432
1222333221

Temperature in field 8x4 after 59 iterations: