Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 12°C. We apply continuously 139°C heat to the field 1x3
What is the temperature (rounded to whole numbers) in the field 6x2 after 100 iterations according to the Gauss-Seidel iteration

Field in the beginning

12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212
12121212121212121212

Field after 4 iterations (rounded after 4th iteration)

4887654431
1529251813108753
39825633211411963
7322094472718131074
449063402618141184
234238292217141184
132223211715131184
7131515131211973
4799998752
2345554321

Temperature in field 6x2 after 100 iterations: