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 171°C heat to the field 9x3
What is the temperature (rounded to whole numbers) in the field 6x0 after 63 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)

47899109898
7111415161716192627
8141820212124345880
915202223253050101237
9162123252631446785
10172124262730364136
9162124252628292719
8151921232324231911
611141617181716127
3678999863

Temperature in field 6x0 after 63 iterations: