Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 16°C. We apply continuously 186°C heat to the field 4x9
What is the temperature (rounded to whole numbers) in the field 3x3 after 76 iterations according to the Gauss-Seidel iteration

Field in the beginning

16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16

Field after 4 iterations (rounded after 4th iteration)

2	4	5	5	5	5	5	5	4	2
4	6	8	9	9	9	9	8	6	3
5	8	10	11	12	12	12	11	8	4
5	9	11	13	13	14	13	12	9	5
5	9	12	13	14	15	14	13	10	5
5	9	12	14	15	16	15	14	10	5
5	9	12	16	22	21	19	15	11	5
5	8	15	29	44	37	26	18	11	5
4	9	24	56	102	64	36	20	11	5
3	9	28	83	253	88	34	15	7	3

Temperature in field 3x3 after 76 iterations:

16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16

2	4	5	5	5	5	5	5	4	2
4	6	8	9	9	9	9	8	6	3
5	8	10	11	12	12	12	11	8	4
5	9	11	13	13	14	13	12	9	5
5	9	12	13	14	15	14	13	10	5
5	9	12	14	15	16	15	14	10	5
5	9	12	16	22	21	19	15	11	5
5	8	15	29	44	37	26	18	11	5
4	9	24	56	102	64	36	20	11	5
3	9	28	83	253	88	34	15	7	3

16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16

2	4	5	5	5	5	5	5	4	2
4	6	8	9	9	9	9	8	6	3
5	8	10	11	12	12	12	11	8	4
5	9	11	13	13	14	13	12	9	5
5	9	12	13	14	15	14	13	10	5
5	9	12	14	15	16	15	14	10	5
5	9	12	16	22	21	19	15	11	5
5	8	15	29	44	37	26	18	11	5
4	9	24	56	102	64	36	20	11	5
3	9	28	83	253	88	34	15	7	3

16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16
16	16	16	16	16	16	16	16	16	16

2	4	5	5	5	5	5	5	4	2
4	6	8	9	9	9	9	8	6	3
5	8	10	11	12	12	12	11	8	4
5	9	11	13	13	14	13	12	9	5
5	9	12	13	14	15	14	13	10	5
5	9	12	14	15	16	15	14	10	5
5	9	12	16	22	21	19	15	11	5
5	8	15	29	44	37	26	18	11	5
4	9	24	56	102	64	36	20	11	5
3	9	28	83	253	88	34	15	7	3