Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 29°C. We apply continuously 140°C heat to the field 4x3
What is the temperature (rounded to whole numbers) in the field 8x8 after 84 iterations according to the Gauss-Seidel iteration

Field in the beginning

29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929
29292929292929292929

Field after 4 iterations (rounded after 4th iteration)

478111515131074
712182942372821147
81732611007147312010
10224610224311262392412
102241741138356392512
10213450645846352412
10192736434237302111
916222731312925189
712161921212017126
36810111110963

Temperature in field 8x8 after 84 iterations: