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 143°C heat to the field 8x0
What is the temperature (rounded to whole numbers) in the field 4x6 after 51 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)

111126196119056
12223719437537
12333613243320
1233459131610
1233456885
1233445553
1233444432
1233333331
1222232221
0111111110

Temperature in field 4x6 after 51 iterations: