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 78°C heat to the field 9x2
What is the temperature (rounded to whole numbers) in the field 1x5 after 123 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)

11111113710
122222492134
12333361641105
1233346132536
123344591314
1233445676
1233444443
1233333332
1222233221
0111111110

Temperature in field 1x5 after 123 iterations: