Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 21°C. We apply continuously 156°C heat to the field 0x5
What is the temperature (rounded to whole numbers) in the field 2x6 after 68 iterations according to the Gauss-Seidel iteration

Field in the beginning

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21

Field after 4 iterations (rounded after 4th iteration)

3	5	6	7	7	7	7	6	5	2
6	9	11	12	12	13	12	11	8	4
11	16	17	17	17	16	16	14	11	6
27	30	26	23	20	19	18	16	12	6
73	57	40	29	24	22	20	17	13	7
215	95	52	34	26	23	21	18	13	7
76	62	44	32	26	23	21	18	13	7
31	35	31	26	22	20	18	16	11	6
14	19	20	18	16	15	14	12	8	4
6	9	9	9	8	8	7	6	4	2

Temperature in field 2x6 after 68 iterations:

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21

3	5	6	7	7	7	7	6	5	2
6	9	11	12	12	13	12	11	8	4
11	16	17	17	17	16	16	14	11	6
27	30	26	23	20	19	18	16	12	6
73	57	40	29	24	22	20	17	13	7
215	95	52	34	26	23	21	18	13	7
76	62	44	32	26	23	21	18	13	7
31	35	31	26	22	20	18	16	11	6
14	19	20	18	16	15	14	12	8	4
6	9	9	9	8	8	7	6	4	2

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21

3	5	6	7	7	7	7	6	5	2
6	9	11	12	12	13	12	11	8	4
11	16	17	17	17	16	16	14	11	6
27	30	26	23	20	19	18	16	12	6
73	57	40	29	24	22	20	17	13	7
215	95	52	34	26	23	21	18	13	7
76	62	44	32	26	23	21	18	13	7
31	35	31	26	22	20	18	16	11	6
14	19	20	18	16	15	14	12	8	4
6	9	9	9	8	8	7	6	4	2

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21

3	5	6	7	7	7	7	6	5	2
6	9	11	12	12	13	12	11	8	4
11	16	17	17	17	16	16	14	11	6
27	30	26	23	20	19	18	16	12	6
73	57	40	29	24	22	20	17	13	7
215	95	52	34	26	23	21	18	13	7
76	62	44	32	26	23	21	18	13	7
31	35	31	26	22	20	18	16	11	6
14	19	20	18	16	15	14	12	8	4
6	9	9	9	8	8	7	6	4	2