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 63°C heat to the field 2x0
What is the temperature (rounded to whole numbers) in the field 3x9 after 74 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)

133695402317141295
1634534233282521168
15293939363331272010
14263437373634302312
14253236373736322413
14243135373736332513
13233033363636322412
12212630323332282110
915202224242421157
5810121313121074

Temperature in field 3x9 after 74 iterations: