Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 35°C. We apply continuously 144°C heat to the field 8x8
What is the temperature (rounded to whole numbers) in the field 0x0 after 93 iterations according to the Gauss-Seidel iteration

Field in the beginning

35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535

Field after 4 iterations (rounded after 4th iteration)

5810111212121184
814171920212018147
1017222526272623189
11192528293029262010
12202629313231282212
12212730323332312816
12202629313235424728
11182326283142679751
81418202228479723180
47910121628518040

Temperature in field 0x0 after 93 iterations: