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 178°C heat to the field 6x1
What is the temperature (rounded to whole numbers) in the field 8x5 after 48 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)

1114174790532510
1239341002761094617
123102865112723917
1238183551412612
123611192522168
1235711131295
1234578763
1233455542
1222333321
0111112111

Temperature in field 8x5 after 48 iterations: