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 181°C heat to the field 6x3
What is the temperature (rounded to whole numbers) in the field 4x1 after 68 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)

3566710141394
581011162944362311
61013173268117774219
6111523491193001286025
71216244382131895123
7121622335167563718
7121519263440362613
610141620242624189
58101214151615116
2456788753

Temperature in field 4x1 after 68 iterations: