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 70°C heat to the field 6x4
What is the temperature (rounded to whole numbers) in the field 7x0 after 122 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)

2334444431
3456689863
357810152117116
4681016304933199
468122249119522511
47912203554372210
4681116232924168
368912151715116
246781010974
1233455432

Temperature in field 7x0 after 122 iterations: