Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 30°C. We apply continuously 124°C heat to the field 6x9
What is the temperature (rounded to whole numbers) in the field 3x6 after 99 iterations according to the Gauss-Seidel iteration

Field in the beginning

30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030
30303030303030303030

Field after 4 iterations (rounded after 4th iteration)

47910101010974
712151717181716126
915192122232220158
1017212425262523179
10172225272727241810
10182326272828251910
10172225273032292111
9162023273645372512
7121519295080522812
46813256217563259

Temperature in field 3x6 after 99 iterations: