Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 4°C. We apply continuously 148°C heat to the field 7x1
What is the temperature (rounded to whole numbers) in the field 4x8 after 134 iterations according to the Gauss-Seidel iteration

Field in the beginning

4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444
4444444444

Field after 4 iterations (rounded after 4th iteration)

111141439754318
1223828842308933
123492454935927
123471630423317
123461016211710
123457911106
1233456763
1233344442
1222333321
0111111111

Temperature in field 4x8 after 134 iterations: