Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 30°C. We apply continuously 123°C heat to the field 3x3
What is the temperature (rounded to whole numbers) in the field 2x0 after 40 iterations according to the Gauss-Seidel iteration

Field in the beginning

30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030

Field after 4 iterations (rounded after 4th iteration)

4711141413121074
715273935282318137
1127559066453325179
1439902161025940292010
143566102765440312111
13284559544537302111
12233340403733282010
1018252931302824179
713172021212017126
47910111110963

Temperature in field 2x0 after 40 iterations: