Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 26°C. We apply continuously 139°C heat to the field 3x8
What is the temperature (rounded to whole numbers) in the field 2x8 after 55 iterations according to the Gauss-Seidel iteration

Field in the beginning

26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626
26262626262626262626

Field after 4 iterations (rounded after 4th iteration)

4688999863
610131415151514105
813161819201917137
814182122222220158
915192224242421168
915222829282622179
918334743352924179
1027589769463324168
11358922999513120136
72147815230181173

Temperature in field 2x8 after 55 iterations: