Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 36°C. We apply continuously 120°C heat to the field 8x5
What is the temperature (rounded to whole numbers) in the field 2x4 after 87 iterations according to the Gauss-Seidel iteration

Field in the beginning

36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636
36363636363636363636

Field after 4 iterations (rounded after 4th iteration)

5810111212121184
814182021212119158
10182325272727262313
11202528303133394225
12212730323544648846
122127313339559720775
12212730333849719449
11192427293339474928
8141821222427292615
4791112131314127

Temperature in field 2x4 after 87 iterations: