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 179°C heat to the field 2x9
What is the temperature (rounded to whole numbers) in the field 1x3 after 78 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
814182021212119147
1018232527272724189
11202528303130272111
12212730323332292212
12212832343433302312
12243437363534302211
15355450423632271910
23591077247342621147
2582248904022151174

Temperature in field 1x3 after 78 iterations: