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 129°C heat to the field 3x7
What is the temperature (rounded to whole numbers) in the field 1x7 after 59 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
5	8	10	12	12	12	12	11	8	4
6	10	13	15	16	16	16	14	11	6
7	12	15	17	18	18	18	16	12	6
7	12	18	23	24	22	21	18	13	7
7	15	28	41	37	30	25	20	14	7
9	25	53	90	64	43	30	22	15	7
11	34	87	217	97	52	32	22	14	7
9	26	55	91	63	40	26	17	11	5
5	14	26	36	30	21	14	9	6	3

Temperature in field 1x7 after 59 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
5	8	10	12	12	12	12	11	8	4
6	10	13	15	16	16	16	14	11	6
7	12	15	17	18	18	18	16	12	6
7	12	18	23	24	22	21	18	13	7
7	15	28	41	37	30	25	20	14	7
9	25	53	90	64	43	30	22	15	7
11	34	87	217	97	52	32	22	14	7
9	26	55	91	63	40	26	17	11	5
5	14	26	36	30	21	14	9	6	3

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	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
5	8	10	12	12	12	12	11	8	4
6	10	13	15	16	16	16	14	11	6
7	12	15	17	18	18	18	16	12	6
7	12	18	23	24	22	21	18	13	7
7	15	28	41	37	30	25	20	14	7
9	25	53	90	64	43	30	22	15	7
11	34	87	217	97	52	32	22	14	7
9	26	55	91	63	40	26	17	11	5
5	14	26	36	30	21	14	9	6	3

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	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
5	8	10	12	12	12	12	11	8	4
6	10	13	15	16	16	16	14	11	6
7	12	15	17	18	18	18	16	12	6
7	12	18	23	24	22	21	18	13	7
7	15	28	41	37	30	25	20	14	7
9	25	53	90	64	43	30	22	15	7
11	34	87	217	97	52	32	22	14	7
9	26	55	91	63	40	26	17	11	5
5	14	26	36	30	21	14	9	6	3