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 143°C heat to the field 1x1
What is the temperature (rounded to whole numbers) in the field 1x6 after 87 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)

32704220942110
7021785361684211
428556311685321
203631201274321
9161612864321
4887643221
2454433211
1233322211
1122221110
0111111100

Temperature in field 1x6 after 87 iterations: