Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 20°C. We apply continuously 121°C heat to the field 4x6
What is the temperature (rounded to whole numbers) in the field 9x4 after 38 iterations according to the Gauss-Seidel iteration

Field in the beginning

20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020

Field after 4 iterations (rounded after 4th iteration)

3566777652
5810111212121084
610131415161514105
611141822222017126
712182840352821157
714275286614027178
7163785207945131189
715305892654227178
511203344382820126
3610151918141063

Temperature in field 9x4 after 38 iterations: