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 192°C heat to the field 7x2
What is the temperature (rounded to whole numbers) in the field 7x8 after 89 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)

12233720352613
2344823601116931
2456144111430512246
34671434741258037
3567122342584523
3567101624292514
35678111517148
245678101085
2345566653
1222333321

Temperature in field 7x8 after 89 iterations: