Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 24°C. We apply continuously 171°C heat to the field 7x1
What is the temperature (rounded to whole numbers) in the field 3x4 after 109 iterations according to the Gauss-Seidel iteration

Field in the beginning

24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424
24242424242424242424

Field after 4 iterations (rounded after 4th iteration)

3678112352925423
6101214214410827511042
71215182442771217736
8131720243551634925
8141820242936393218
8141821232629292313
8141820222425231810
713161820202119148
59121415151513105
3567888752

Temperature in field 3x4 after 109 iterations: