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 131°C heat to the field 1x5
What is the temperature (rounded to whole numbers) in the field 2x6 after 138 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)

5911121313131295
916202223232320158
13252931313029262010
24454642383634302212
46957456464137322413
7822511068514339342513
511018061494338332412
30535347423834292111
1729333230282621158
81316161515131184

Temperature in field 2x6 after 138 iterations: