Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 28°C. We apply continuously 175°C heat to the field 8x4
What is the temperature (rounded to whole numbers) in the field 4x5 after 50 iterations according to the Gauss-Seidel iteration

Field in the beginning

28282828282828282828
28282828282828282828
28282828282828282828
28282828282828282828
28282828282828282828
28282828282828282828
28282828282828282828
28282828282828282828
28282828282828282828
28282828282828282828

Field after 4 iterations (rounded after 4th iteration)

47899109874
7111415161716171811
8141820212125354528
91520222327407211259
9162123263357120286102
101721242633508412265
9162124263040546136
8151921232630353320
6111416171920211911
3678910101085

Temperature in field 4x5 after 50 iterations: