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 137°C heat to the field 4x8
What is the temperature (rounded to whole numbers) in the field 2x4 after 46 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
1112222211
1124775321
11515262113742
1314417849261362
16257621283361673
1516407344221052

Temperature in field 2x4 after 46 iterations: