Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 14°C. We apply continuously 123°C heat to the field 3x5
What is the temperature (rounded to whole numbers) in the field 5x0 after 78 iterations according to the Gauss-Seidel iteration

Field in the beginning

14141414141414141414
14141414141414141414
14141414141414141414
14141414141414141414
14141414141414141414
14141414141414141414
14141414141414141414
14141414141414141414
14141414141414141414
14141414141414141414

Field after 4 iterations (rounded after 4th iteration)

2344555432
3678998763
4711151514121074
41122332922171395
720468156352316115
10308020489462818126
925548862402618116
717324438292115105
51117232218141173
258101097542

Temperature in field 5x0 after 78 iterations: