Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 7°C. We apply continuously 108°C heat to the field 3x3
What is the temperature (rounded to whole numbers) in the field 8x5 after 122 iterations according to the Gauss-Seidel iteration

Field in the beginning

7777777777
7777777777
7777777777
7777777777
7777777777
7777777777
7777777777
7777777777
7777777777
7777777777

Field after 4 iterations (rounded after 4th iteration)

1246654321
25142319139642
4143666432514953
623661747335191163
61943735030181173
51325353022151073
491419181512963
3691111109752
2456776532
1233333221

Temperature in field 8x5 after 122 iterations: