Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 27°C. We apply continuously 87°C heat to the field 5x2
What is the temperature (rounded to whole numbers) in the field 6x1 after 90 iterations according to the Gauss-Seidel iteration

Field in the beginning

27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27

Field after 4 iterations (rounded after 4th iteration)

4	6	8	11	17	24	20	14	9	4
6	11	15	23	41	65	46	29	18	8
8	14	20	35	69	156	74	41	24	11
9	15	22	34	53	77	58	39	25	12
9	16	22	30	40	48	43	34	23	12
9	16	22	27	32	36	34	29	21	11
9	16	21	24	28	29	29	25	19	10
8	14	18	21	23	24	24	21	15	8
6	11	14	16	17	18	17	15	11	5
3	6	7	8	9	9	9	8	5	3

Temperature in field 6x1 after 90 iterations:

27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27

4	6	8	11	17	24	20	14	9	4
6	11	15	23	41	65	46	29	18	8
8	14	20	35	69	156	74	41	24	11
9	15	22	34	53	77	58	39	25	12
9	16	22	30	40	48	43	34	23	12
9	16	22	27	32	36	34	29	21	11
9	16	21	24	28	29	29	25	19	10
8	14	18	21	23	24	24	21	15	8
6	11	14	16	17	18	17	15	11	5
3	6	7	8	9	9	9	8	5	3

27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27

4	6	8	11	17	24	20	14	9	4
6	11	15	23	41	65	46	29	18	8
8	14	20	35	69	156	74	41	24	11
9	15	22	34	53	77	58	39	25	12
9	16	22	30	40	48	43	34	23	12
9	16	22	27	32	36	34	29	21	11
9	16	21	24	28	29	29	25	19	10
8	14	18	21	23	24	24	21	15	8
6	11	14	16	17	18	17	15	11	5
3	6	7	8	9	9	9	8	5	3

27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27

4	6	8	11	17	24	20	14	9	4
6	11	15	23	41	65	46	29	18	8
8	14	20	35	69	156	74	41	24	11
9	15	22	34	53	77	58	39	25	12
9	16	22	30	40	48	43	34	23	12
9	16	22	27	32	36	34	29	21	11
9	16	21	24	28	29	29	25	19	10
8	14	18	21	23	24	24	21	15	8
6	11	14	16	17	18	17	15	11	5
3	6	7	8	9	9	9	8	5	3