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 156°C heat to the field 2x6
What is the temperature (rounded to whole numbers) in the field 4x9 after 57 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
1018232627282724189
11223234343331282111
16365552453935302212
266711586614739322412
38108270128745241332312
317312190634737302110
1941595443342822157
91926252218151184

Temperature in field 4x9 after 57 iterations: