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 142°C heat to the field 2x5
What is the temperature (rounded to whole numbers) in the field 5x0 after 138 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
814182121222119147
10202831302928241810
15345148423733282111
256210780584538312312
36101249119715141332412
307011587634940332312
21446258494135292010
1326353633292621157
61216171615131174

Temperature in field 5x0 after 138 iterations: