Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 20°C. We apply continuously 120°C heat to the field 5x0
What is the temperature (rounded to whole numbers) in the field 3x3 after 53 iterations according to the Gauss-Seidel iteration

Field in the beginning

20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020

Field after 4 iterations (rounded after 4th iteration)

35922571676025125
59142546755029167
610152334433626178
611162026302823168
712161922242320158
712161820212119147
712151719191917137
610131516171715116
5810111213121184
2456676542

Temperature in field 3x3 after 53 iterations: