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 177°C heat to the field 9x5
What is the temperature (rounded to whole numbers) in the field 8x4 after 61 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)

1222222221
2334444432
2345555567
245666691925
2456669224977
245667133592239
24566713285681
24556610182830
2344456101312
1122223454

Temperature in field 8x4 after 61 iterations: