Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 2°C. We apply continuously 187°C heat to the field 1x1
What is the temperature (rounded to whole numbers) in the field 1x4 after 77 iterations according to the Gauss-Seidel iteration

Field in the beginning

2222222222
2222222222
2222222222
2222222222
2222222222
2222222222
2222222222
2222222222
2222222222
2222222222

Field after 4 iterations (rounded after 4th iteration)

429154261253110
912841114721105311
54111734020106321
264740261695321
122120161174321
510109754321
3565443221
1333332211
1122222110
0111111100

Temperature in field 1x4 after 77 iterations: