Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 12°C. We apply continuously 123°C heat to the field 1x5
What is the temperature (rounded to whole numbers) in the field 8x1 after 126 iterations according to the Gauss-Seidel iteration

Field in the beginning

12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212

Field after 4 iterations (rounded after 4th iteration)

2334444431
3577777652
511121111109863
142826201513111074
357552322116131184
6519685432618141184
408157362417141184
213734261915121073
1018191613119752
4788765431

Temperature in field 8x1 after 126 iterations: