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 168°C heat to the field 1x3
What is the temperature (rounded to whole numbers) in the field 7x1 after 137 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)

61213121098763
2039352721171513105
50104734732252117136
912721206440292420147
57114845639312621158
3156534335292521168
1832353330272421158
1220242524232118137
71316171717161395
3689998752

Temperature in field 7x1 after 137 iterations: