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 148°C heat to the field 4x4
What is the temperature (rounded to whole numbers) in the field 0x6 after 116 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)

2445666542
467111514121073
47132538322316105
511255596653924147
61538962451065330178
6143265106744629178
612233953463424157
510162430292418126
4710141717151284
2357887642

Temperature in field 0x6 after 116 iterations: