Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 29°C. We apply continuously 160°C heat to the field 1x2
What is the temperature (rounded to whole numbers) in the field 3x9 after 87 iterations according to the Gauss-Seidel iteration

Field in the beginning

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

Field after 4 iterations (rounded after 4th iteration)

17	33	28	21	15	12	11	9	7	3
47	99	69	44	30	23	19	16	12	6
88	260	116	63	40	30	25	21	15	8
56	112	83	57	41	33	28	24	17	9
32	57	55	46	38	33	29	25	18	10
20	34	38	37	34	32	29	25	19	10
14	24	29	31	30	29	28	24	18	9
10	18	23	25	26	26	24	21	16	8
7	13	16	18	19	19	18	16	11	6
4	6	8	9	10	10	9	8	6	3

Temperature in field 3x9 after 87 iterations:

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

17	33	28	21	15	12	11	9	7	3
47	99	69	44	30	23	19	16	12	6
88	260	116	63	40	30	25	21	15	8
56	112	83	57	41	33	28	24	17	9
32	57	55	46	38	33	29	25	18	10
20	34	38	37	34	32	29	25	19	10
14	24	29	31	30	29	28	24	18	9
10	18	23	25	26	26	24	21	16	8
7	13	16	18	19	19	18	16	11	6
4	6	8	9	10	10	9	8	6	3

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

17	33	28	21	15	12	11	9	7	3
47	99	69	44	30	23	19	16	12	6
88	260	116	63	40	30	25	21	15	8
56	112	83	57	41	33	28	24	17	9
32	57	55	46	38	33	29	25	18	10
20	34	38	37	34	32	29	25	19	10
14	24	29	31	30	29	28	24	18	9
10	18	23	25	26	26	24	21	16	8
7	13	16	18	19	19	18	16	11	6
4	6	8	9	10	10	9	8	6	3

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

17	33	28	21	15	12	11	9	7	3
47	99	69	44	30	23	19	16	12	6
88	260	116	63	40	30	25	21	15	8
56	112	83	57	41	33	28	24	17	9
32	57	55	46	38	33	29	25	18	10
20	34	38	37	34	32	29	25	19	10
14	24	29	31	30	29	28	24	18	9
10	18	23	25	26	26	24	21	16	8
7	13	16	18	19	19	18	16	11	6
4	6	8	9	10	10	9	8	6	3