Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 13°C. We apply continuously 68°C heat to the field 6x3
What is the temperature (rounded to whole numbers) in the field 5x0 after 143 iterations according to the Gauss-Seidel iteration

Field in the beginning

13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313

Field after 4 iterations (rounded after 4th iteration)

2344457652
35679142016115
4681016304833199
479132349117522611
481013213654382210
48101317243026179
48101215182018137
4791012131413105
3578899863
2334455432

Temperature in field 5x0 after 143 iterations: