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 87°C heat to the field 1x4
What is the temperature (rounded to whole numbers) in the field 9x2 after 142 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)

0111111100
2443221110
816139532211
23493217953211
4413555251264221
265336201164321
13232013854221
610108643211
3555432110
1222211110

Temperature in field 9x2 after 142 iterations: