Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 4°C. We apply continuously 176°C heat to the field 3x4
What is the temperature (rounded to whole numbers) in the field 5x6 after 72 iterations according to the Gauss-Seidel iteration

Field in the beginning

4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444

Field after 4 iterations (rounded after 4th iteration)

1112222111
1259975321
161934281810642
419541026535181052
83410227811351251363
827651137442231273
51735514228171063
391824221712852
2591212107532
1245543321

Temperature in field 5x6 after 72 iterations: