Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 37°C. We apply continuously 99°C heat to the field 8x1
What is the temperature (rounded to whole numbers) in the field 4x8 after 76 iterations according to the Gauss-Seidel iteration

Field in the beginning

37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737
37373737373737373737

Field after 4 iterations (rounded after 4th iteration)

591112121421365628
91518202226397316558
11182326283241597740
12202629313439454626
12222731333537383319
13222832343536342815
12222831333434322413
11192528303130272010
815192123232320147
4810111212121074

Temperature in field 4x8 after 76 iterations: