Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 36°C. We apply continuously 90°C heat to the field 5x5
What is the temperature (rounded to whole numbers) in the field 1x7 after 71 iterations according to the Gauss-Seidel iteration

Field in the beginning

36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636

Field after 4 iterations (rounded after 4th iteration)

5810111212121184
814182021222119147
10182325283130261910
11202531394743352412
12212839588464453015
122231478417489543316
12213043648969493215
11192635455449382613
814192430333226189
4710121516151394

Temperature in field 1x7 after 71 iterations: