Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 26°C. We apply continuously 188°C heat to the field 6x1
What is the temperature (rounded to whole numbers) in the field 1x9 after 69 iterations according to the Gauss-Seidel iteration

Field in the beginning

26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626

Field after 4 iterations (rounded after 4th iteration)

468112557102623213
6101422481193041265723
81317254685135915223
8141925375672604019
9152024314046413016
9152024273234312413
9151922252728261910
814172022232321158
610131516171715115
3578898753

Temperature in field 1x9 after 69 iterations: