Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 25°C. We apply continuously 172°C heat to the field 9x5
What is the temperature (rounded to whole numbers) in the field 4x2 after 48 iterations according to the Gauss-Seidel iteration

Field in the beginning

25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525
25252525252525252525

Field after 4 iterations (rounded after 4th iteration)

3678888863
610121415151513106
7121618191919171512
8141820212121232929
8151921222325365981
815192123243049101238
8151921222429426584
8131719202124303734
6101314151617192015
3577889996

Temperature in field 4x2 after 48 iterations: