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 150°C heat to the field 4x5
What is the temperature (rounded to whole numbers) in the field 6x9 after 143 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	9	9	9	9	8	6	3
6	11	13	15	16	17	16	14	11	6
8	13	17	21	26	26	24	20	15	8
9	15	23	36	50	44	35	27	18	9
9	18	34	66	108	77	51	35	22	11
10	22	47	108	259	119	65	40	25	12
10	21	41	76	118	85	57	38	24	12
9	18	30	48	62	55	43	31	20	10
6	13	20	28	34	33	28	21	14	7
3	6	10	13	16	16	14	11	7	4

Temperature in field 6x9 after 143 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	9	9	9	9	8	6	3
6	11	13	15	16	17	16	14	11	6
8	13	17	21	26	26	24	20	15	8
9	15	23	36	50	44	35	27	18	9
9	18	34	66	108	77	51	35	22	11
10	22	47	108	259	119	65	40	25	12
10	21	41	76	118	85	57	38	24	12
9	18	30	48	62	55	43	31	20	10
6	13	20	28	34	33	28	21	14	7
3	6	10	13	16	16	14	11	7	4

27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	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	9	9	9	9	8	6	3
6	11	13	15	16	17	16	14	11	6
8	13	17	21	26	26	24	20	15	8
9	15	23	36	50	44	35	27	18	9
9	18	34	66	108	77	51	35	22	11
10	22	47	108	259	119	65	40	25	12
10	21	41	76	118	85	57	38	24	12
9	18	30	48	62	55	43	31	20	10
6	13	20	28	34	33	28	21	14	7
3	6	10	13	16	16	14	11	7	4

27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	27	27	27	27
27	27	27	27	27	27	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	9	9	9	9	8	6	3
6	11	13	15	16	17	16	14	11	6
8	13	17	21	26	26	24	20	15	8
9	15	23	36	50	44	35	27	18	9
9	18	34	66	108	77	51	35	22	11
10	22	47	108	259	119	65	40	25	12
10	21	41	76	118	85	57	38	24	12
9	18	30	48	62	55	43	31	20	10
6	13	20	28	34	33	28	21	14	7
3	6	10	13	16	16	14	11	7	4