Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 11°C. We apply continuously 68°C heat to the field 5x7
What is the temperature (rounded to whole numbers) in the field 3x0 after 47 iterations according to the Gauss-Seidel iteration

Field in the beginning

11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111
11111111111111111111

Field after 4 iterations (rounded after 4th iteration)

2334444321
3456676642
3578888763
468991010963
46891113121184
4781117232015105
4691630483421126
361021471155126146
2581630493320115
12481419161063

Temperature in field 3x0 after 47 iterations: