Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 27°C. We apply continuously 111°C heat to the field 4x5
What is the temperature (rounded to whole numbers) in the field 0x5 after 73 iterations according to the Gauss-Seidel iteration

Field in the beginning

27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727
27272727272727272727

Field after 4 iterations (rounded after 4th iteration)

4689999863
611131516171614116
813172125252320147
915223243393225189
9173155876444312110
102040861989555362311
10203662937049342211
917274152463728199
612182530292520137
369121414121073

Temperature in field 0x5 after 73 iterations: