Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 39°C. We apply continuously 69°C heat to the field 0x3
What is the temperature (rounded to whole numbers) in the field 9x5 after 149 iterations according to the Gauss-Seidel iteration

Field in the beginning

39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939
39393939393939393939

Field after 4 iterations (rounded after 4th iteration)

71113131313131295
1823242424242320158
40393533313129262010
105584338363533302212
44454139383736322413
24343738383837332513
17283336373736322412
13232831323332282110
916212324252421157
5811121313121074

Temperature in field 9x5 after 149 iterations: