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 64°C heat to the field 3x5
What is the temperature (rounded to whole numbers) in the field 7x5 after 77 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	16	16	14	11	6
8	13	18	22	22	22	21	18	14	7
9	16	25	33	32	28	25	22	16	8
10	22	39	59	47	36	30	24	17	9
12	28	57	123	65	43	33	26	18	9
11	25	43	63	50	39	31	25	18	9
10	19	30	38	36	31	27	22	15	8
7	13	19	23	23	22	19	16	11	6
4	7	9	11	12	11	10	8	6	3

Temperature in field 7x5 after 77 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	16	16	14	11	6
8	13	18	22	22	22	21	18	14	7
9	16	25	33	32	28	25	22	16	8
10	22	39	59	47	36	30	24	17	9
12	28	57	123	65	43	33	26	18	9
11	25	43	63	50	39	31	25	18	9
10	19	30	38	36	31	27	22	15	8
7	13	19	23	23	22	19	16	11	6
4	7	9	11	12	11	10	8	6	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	9	9	9	9	8	6	3
6	11	13	15	16	16	16	14	11	6
8	13	18	22	22	22	21	18	14	7
9	16	25	33	32	28	25	22	16	8
10	22	39	59	47	36	30	24	17	9
12	28	57	123	65	43	33	26	18	9
11	25	43	63	50	39	31	25	18	9
10	19	30	38	36	31	27	22	15	8
7	13	19	23	23	22	19	16	11	6
4	7	9	11	12	11	10	8	6	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	9	9	9	9	8	6	3
6	11	13	15	16	16	16	14	11	6
8	13	18	22	22	22	21	18	14	7
9	16	25	33	32	28	25	22	16	8
10	22	39	59	47	36	30	24	17	9
12	28	57	123	65	43	33	26	18	9
11	25	43	63	50	39	31	25	18	9
10	19	30	38	36	31	27	22	15	8
7	13	19	23	23	22	19	16	11	6
4	7	9	11	12	11	10	8	6	3