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 112°C heat to the field 4x4
What is the temperature (rounded to whole numbers) in the field 5x1 after 84 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)

5911121314131295
915192327272522168
11192738494538312211
12233864967353392713
1327499621010565453015
142745731058260443015
13253853656051402814
12223139454440332412
916222730302824178
5811131515141284

Temperature in field 5x1 after 84 iterations: