Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 23°C. We apply continuously 138°C heat to the field 6x7
What is the temperature (rounded to whole numbers) in the field 3x7 after 127 iterations according to the Gauss-Seidel iteration

Field in the beginning

23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323

Field after 4 iterations (rounded after 4th iteration)

3577888753
5911131314131295
711141617171715126
713161819202018147
813171920232624179
8141720243546382613
8131722346199673918
712162343972341024920
591218336299663716
3571017293931199

Temperature in field 3x7 after 127 iterations: