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 69°C heat to the field 5x4
What is the temperature (rounded to whole numbers) in the field 7x2 after 118 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
59111314161614105
711141824302721147
713172539594430199
81420325912964372211
8142029456549342211
8141925334036281910
712162024272622158
59121417181815115
3567899753

Temperature in field 7x2 after 118 iterations: