Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 9°C. We apply continuously 86°C heat to the field 0x7
What is the temperature (rounded to whole numbers) in the field 1x5 after 140 iterations according to the Gauss-Seidel iteration

Field in the beginning

9999999999
9999999999
9999999999
9999999999
9999999999
9999999999
9999999999
9999999999
9999999999
9999999999

Field after 4 iterations (rounded after 4th iteration)

1233333321
2445555542
3466777652
3577888753
6899988753
141513111099863
3930201411109863
1175026161198752
40301913976542
1313107543321

Temperature in field 1x5 after 140 iterations: