Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 35°C. We apply continuously 136°C heat to the field 5x7
What is the temperature (rounded to whole numbers) in the field 2x7 after 138 iterations according to the Gauss-Seidel iteration

Field in the beginning

35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535
35353535353535353535

Field after 4 iterations (rounded after 4th iteration)

5810111212121184
814171920212018147
1017222526272623189
11192528293130272011
12202629333736322312
12212733455751402814
122028427110980533316
11192951105241113623416
81423396810675472712
48122032433524157

Temperature in field 2x7 after 138 iterations: