Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 20°C. We apply continuously 114°C heat to the field 8x2
What is the temperature (rounded to whole numbers) in the field 4x8 after 58 iterations according to the Gauss-Seidel iteration

Field in the beginning

20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020

Field after 4 iterations (rounded after 4th iteration)

3566779162314
581011121423437037
61013141520357718565
6111416172133558042
7121517182127364124
7121517182023262515
7121517181920201710
610131516171716137
5810111213131184
2456676642

Temperature in field 4x8 after 58 iterations: