Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 4°C. We apply continuously 111°C heat to the field 9x6
What is the temperature (rounded to whole numbers) in the field 7x7 after 146 iterations according to the Gauss-Seidel iteration

Field in the beginning

4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444

Field after 4 iterations (rounded after 4th iteration)

1111111110
1222222221
1233333321
1233333345
123344461215
1233445133148
12334482257149
1233347173450
1222235101718
0111123576

Temperature in field 7x7 after 146 iterations: