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 154°C heat to the field 3x9
What is the temperature (rounded to whole numbers) in the field 7x1 after 70 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)

0000000000
0001111100
0011111110
0111111110
0111111110
0111221110
0137653210
04152720126321
3144077452210521
5206520668259421

Temperature in field 7x1 after 70 iterations: