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 182°C heat to the field 1x3
What is the temperature (rounded to whole numbers) in the field 3x4 after 138 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)

613141311109863
2242382923191714105
54113795135272219147
992941306943322621168
62124916143332823179
3461584738322823179
2035383632292622168
1322262726252320147
814171818181714105
4789999753

Temperature in field 3x4 after 138 iterations: