Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 17°C. We apply continuously 107°C heat to the field 3x4
What is the temperature (rounded to whole numbers) in the field 2x4 after 86 iterations according to the Gauss-Seidel iteration

Field in the beginning

17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17

Field after 4 iterations (rounded after 4th iteration)

2	4	5	6	6	6	6	5	4	2
4	7	10	14	14	13	11	10	7	4
5	11	21	31	28	22	17	13	9	5
7	20	43	74	52	34	23	17	11	6
10	29	73	181	82	44	28	19	13	6
10	25	51	81	59	39	27	20	13	7
8	19	32	43	38	31	24	18	12	6
6	13	21	26	25	22	19	15	11	5
4	9	13	15	16	15	13	11	7	4
2	4	6	7	8	7	7	5	4	2

Temperature in field 2x4 after 86 iterations:

17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17

2	4	5	6	6	6	6	5	4	2
4	7	10	14	14	13	11	10	7	4
5	11	21	31	28	22	17	13	9	5
7	20	43	74	52	34	23	17	11	6
10	29	73	181	82	44	28	19	13	6
10	25	51	81	59	39	27	20	13	7
8	19	32	43	38	31	24	18	12	6
6	13	21	26	25	22	19	15	11	5
4	9	13	15	16	15	13	11	7	4
2	4	6	7	8	7	7	5	4	2

17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17

2	4	5	6	6	6	6	5	4	2
4	7	10	14	14	13	11	10	7	4
5	11	21	31	28	22	17	13	9	5
7	20	43	74	52	34	23	17	11	6
10	29	73	181	82	44	28	19	13	6
10	25	51	81	59	39	27	20	13	7
8	19	32	43	38	31	24	18	12	6
6	13	21	26	25	22	19	15	11	5
4	9	13	15	16	15	13	11	7	4
2	4	6	7	8	7	7	5	4	2

17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17

2	4	5	6	6	6	6	5	4	2
4	7	10	14	14	13	11	10	7	4
5	11	21	31	28	22	17	13	9	5
7	20	43	74	52	34	23	17	11	6
10	29	73	181	82	44	28	19	13	6
10	25	51	81	59	39	27	20	13	7
8	19	32	43	38	31	24	18	12	6
6	13	21	26	25	22	19	15	11	5
4	9	13	15	16	15	13	11	7	4
2	4	6	7	8	7	7	5	4	2