Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 23°C. We apply continuously 180°C heat to the field 7x5
What is the temperature (rounded to whole numbers) in the field 1x4 after 89 iterations according to the Gauss-Seidel iteration

Field in the beginning

23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323
23232323232323232323

Field after 4 iterations (rounded after 4th iteration)

3577888753
59111313141313105
7111416171720231810
7131618192437503820
81317192338731207635
8141720285412330012549
81317202746841318539
7121518233451655026
591214162229332715
35678111314127

Temperature in field 1x4 after 89 iterations: