Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 31°C. We apply continuously 87°C heat to the field 0x8
What is the temperature (rounded to whole numbers) in the field 8x5 after 43 iterations according to the Gauss-Seidel iteration

Field in the beginning

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31

Field after 4 iterations (rounded after 4th iteration)

4	7	9	10	10	11	10	9	7	4
7	12	15	17	18	18	18	16	12	6
9	15	19	22	23	24	23	21	16	8
10	17	22	25	26	27	26	23	18	9
11	18	23	26	28	28	28	25	19	10
13	21	26	28	29	29	29	26	19	10
21	28	29	29	29	29	28	25	19	10
46	41	34	30	28	27	26	22	16	8
122	57	34	26	22	21	19	17	12	6
38	29	20	15	12	11	10	8	6	3

Temperature in field 8x5 after 43 iterations:

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31

4	7	9	10	10	11	10	9	7	4
7	12	15	17	18	18	18	16	12	6
9	15	19	22	23	24	23	21	16	8
10	17	22	25	26	27	26	23	18	9
11	18	23	26	28	28	28	25	19	10
13	21	26	28	29	29	29	26	19	10
21	28	29	29	29	29	28	25	19	10
46	41	34	30	28	27	26	22	16	8
122	57	34	26	22	21	19	17	12	6
38	29	20	15	12	11	10	8	6	3

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31

4	7	9	10	10	11	10	9	7	4
7	12	15	17	18	18	18	16	12	6
9	15	19	22	23	24	23	21	16	8
10	17	22	25	26	27	26	23	18	9
11	18	23	26	28	28	28	25	19	10
13	21	26	28	29	29	29	26	19	10
21	28	29	29	29	29	28	25	19	10
46	41	34	30	28	27	26	22	16	8
122	57	34	26	22	21	19	17	12	6
38	29	20	15	12	11	10	8	6	3

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31

4	7	9	10	10	11	10	9	7	4
7	12	15	17	18	18	18	16	12	6
9	15	19	22	23	24	23	21	16	8
10	17	22	25	26	27	26	23	18	9
11	18	23	26	28	28	28	25	19	10
13	21	26	28	29	29	29	26	19	10
21	28	29	29	29	29	28	25	19	10
46	41	34	30	28	27	26	22	16	8
122	57	34	26	22	21	19	17	12	6
38	29	20	15	12	11	10	8	6	3