Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 1°C. We apply continuously 68°C heat to the field 8x3
What is the temperature (rounded to whole numbers) in the field 8x1 after 55 iterations according to the Gauss-Seidel iteration

Field in the beginning

1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111

Field after 4 iterations (rounded after 4th iteration)

0000000132
00011127128
0011127203820
011114133910536
01111310244122
0111137131811
0111124685
0111112342
0011111221
0000001110

Temperature in field 8x1 after 55 iterations: