Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 16°C. We apply continuously 106°C heat to the field 6x4
What is the temperature (rounded to whole numbers) in the field 8x5 after 84 iterations according to the Gauss-Seidel iteration

Field in the beginning

16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616

Field after 4 iterations (rounded after 4th iteration)

2455556542
4689911141295
58101114223126178
591114244573492813
5912183374180793816
591318295281563315
591216233443362412
58111417222623168
4681012141514105
2345677753

Temperature in field 8x5 after 84 iterations: