Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 17°C. We apply continuously 112°C heat to the field 8x4
What is the temperature (rounded to whole numbers) in the field 3x0 after 66 iterations according to the Gauss-Seidel iteration

Field in the beginning

17171717171717171717
17171717171717171717
17171717171717171717
17171717171717171717
17171717171717171717
17171717171717171717
17171717171717171717
17171717171717171717
17171717171717171717
17171717171717171717

Field after 4 iterations (rounded after 4th iteration)

2455666543
478910101011117
581112131315222817
591213141625457138
61013141620357618365
6101315162031537841
6101314161825343823
591113141618212113
4791010111213127
2345566653

Temperature in field 3x0 after 66 iterations: