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 158°C heat to the field 8x1
What is the temperature (rounded to whole numbers) in the field 0x7 after 51 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)

12233516427839
2344511329024282
245671228599751
346671120344427
35677914192214
3567791012128
3567789985
2456677753
2345555542
1222333221

Temperature in field 0x7 after 51 iterations: