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 134°C heat to the field 2x6
What is the temperature (rounded to whole numbers) in the field 2x3 after 129 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)

47899109863
711141516171615116
814182021222119147
918252727262422168
1229454236312824189
22569771503831251810
329123010761423226189
25611027552383023168
1634504435282217126
8152121181412963

Temperature in field 2x3 after 129 iterations: