Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 13°C. We apply continuously 157°C heat to the field 3x4
What is the temperature (rounded to whole numbers) in the field 1x8 after 48 iterations according to the Gauss-Seidel iteration

Field in the beginning

13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313
13131313131313131313

Field after 4 iterations (rounded after 4th iteration)

2345555432
35913131210863
41023373223161284
722559966402416105
103698256109543019126
10306510975462919126
820385346342417115
61322292823181495
481316161512963
2467776532

Temperature in field 1x8 after 48 iterations: