Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 8°C. We apply continuously 61°C heat to the field 8x2
What is the temperature (rounded to whole numbers) in the field 9x1 after 148 iterations according to the Gauss-Seidel iteration

Field in the beginning

8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888
8888888888

Field after 4 iterations (rounded after 4th iteration)

12233348127
23445610223619
24566917399834
34667915274122
35677912172012
3567781012127
3567788984
2456677753
2345555542
1222333221

Temperature in field 9x1 after 148 iterations: