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 200°C heat to the field 4x6
What is the temperature (rounded to whole numbers) in the field 7x9 after 120 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
10182325282828241810
11202532383835302211
12213149686149372613
1224468914510469473015
13296314334515887533215
1226529815411073472914
9193556756549342110
510172632302417115

Temperature in field 7x9 after 120 iterations: