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 113°C heat to the field 7x6
What is the temperature (rounded to whole numbers) in the field 4x0 after 99 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
814182021212119158
9152022232425262011
9162123252836433317
10172124273759875727
91621243046891998635
8151922273962905928
6111416202737453417
367910131719158

Temperature in field 4x0 after 99 iterations: