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 76°C heat to the field 1x8
What is the temperature (rounded to whole numbers) in the field 7x2 after 88 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)

0011111100
0111111110
1111121111
1112222211
1122222211
2444322211
715128532211
20422715843211
371164620953210
19392412632110

Temperature in field 7x2 after 88 iterations: