Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 19°C. We apply continuously 199°C heat to the field 1x4
What is the temperature (rounded to whole numbers) in the field 4x6 after 67 iterations according to the Gauss-Seidel iteration

Field in the beginning

19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19

Field after 4 iterations (rounded after 4th iteration)

3	5	6	7	7	7	6	6	4	2
8	16	17	15	14	13	12	10	8	4
23	45	40	30	22	18	16	13	10	5
57	120	82	51	33	24	19	16	11	6
105	317	136	69	41	28	22	17	12	6
64	130	92	59	39	28	22	18	13	7
34	61	56	43	32	26	21	17	12	6
18	31	33	29	25	21	18	15	11	5
9	17	19	19	17	15	13	11	8	4
4	7	9	9	9	8	7	6	4	2

Temperature in field 4x6 after 67 iterations:

19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19

3	5	6	7	7	7	6	6	4	2
8	16	17	15	14	13	12	10	8	4
23	45	40	30	22	18	16	13	10	5
57	120	82	51	33	24	19	16	11	6
105	317	136	69	41	28	22	17	12	6
64	130	92	59	39	28	22	18	13	7
34	61	56	43	32	26	21	17	12	6
18	31	33	29	25	21	18	15	11	5
9	17	19	19	17	15	13	11	8	4
4	7	9	9	9	8	7	6	4	2

19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19

3	5	6	7	7	7	6	6	4	2
8	16	17	15	14	13	12	10	8	4
23	45	40	30	22	18	16	13	10	5
57	120	82	51	33	24	19	16	11	6
105	317	136	69	41	28	22	17	12	6
64	130	92	59	39	28	22	18	13	7
34	61	56	43	32	26	21	17	12	6
18	31	33	29	25	21	18	15	11	5
9	17	19	19	17	15	13	11	8	4
4	7	9	9	9	8	7	6	4	2

19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19

3	5	6	7	7	7	6	6	4	2
8	16	17	15	14	13	12	10	8	4
23	45	40	30	22	18	16	13	10	5
57	120	82	51	33	24	19	16	11	6
105	317	136	69	41	28	22	17	12	6
64	130	92	59	39	28	22	18	13	7
34	61	56	43	32	26	21	17	12	6
18	31	33	29	25	21	18	15	11	5
9	17	19	19	17	15	13	11	8	4
4	7	9	9	9	8	7	6	4	2