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 133°C heat to the field 9x1
What is the temperature (rounded to whole numbers) in the field 8x6 after 52 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)

478991011193654
71114151617213675181
8141820212226355266
9152022232527313429
9162123252627272517
10172124262627252112
9162124252626241810
815192123232320158
611141617181715116
3678999853

Temperature in field 8x6 after 52 iterations: