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 153°C heat to the field 6x1
What is the temperature (rounded to whole numbers) in the field 1x3 after 74 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)

001314407745229
01272885237933915
1127235596613214
1125142942342110
11248152018136
11235810974
1122345542
1112233321
0111122211
0011111110

Temperature in field 1x3 after 74 iterations: