Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 21°C. We apply continuously 180°C heat to the field 3x0
What is the temperature (rounded to whole numbers) in the field 9x9 after 58 iterations according to the Gauss-Seidel iteration

Field in the beginning

21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121
21212121212121212121

Field after 4 iterations (rounded after 4th iteration)

828822478736181063
11296310769412517115
1023415648362619137
918283534302520147
815222627252319147
814192223232219147
713171921212018137
611151718181815116
5811121313131184
2466777642

Temperature in field 9x9 after 58 iterations: