Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 27°C. We apply continuously 121°C heat to the field 6x0
What is the temperature (rounded to whole numbers) in the field 2x7 after 30 iterations according to the Gauss-Seidel iteration

Field in the beginning

27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727

Field after 4 iterations (rounded after 4th iteration)

468122460171622510
6111419305180522913
8131722293948402613
9151923273235322312
9162023262930272011
9162123262727251910
916202325262623179
814182022232220158
611141517171714105
3678999753

Temperature in field 2x7 after 30 iterations: