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 136°C heat to the field 4x6
What is the temperature (rounded to whole numbers) in the field 4x3 after 66 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	13	12	11	8	4
5	9	11	15	19	19	17	14	10	5
5	9	15	26	39	34	26	19	12	6
5	12	25	53	91	63	39	25	15	7
6	15	36	90	227	100	51	29	17	8
5	13	30	60	98	68	42	26	15	7
4	10	19	34	46	39	28	19	11	5
2	5	9	15	19	18	14	10	6	3

Temperature in field 4x3 after 66 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	13	12	11	8	4
5	9	11	15	19	19	17	14	10	5
5	9	15	26	39	34	26	19	12	6
5	12	25	53	91	63	39	25	15	7
6	15	36	90	227	100	51	29	17	8
5	13	30	60	98	68	42	26	15	7
4	10	19	34	46	39	28	19	11	5
2	5	9	15	19	18	14	10	6	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	13	12	11	8	4
5	9	11	15	19	19	17	14	10	5
5	9	15	26	39	34	26	19	12	6
5	12	25	53	91	63	39	25	15	7
6	15	36	90	227	100	51	29	17	8
5	13	30	60	98	68	42	26	15	7
4	10	19	34	46	39	28	19	11	5
2	5	9	15	19	18	14	10	6	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	13	12	11	8	4
5	9	11	15	19	19	17	14	10	5
5	9	15	26	39	34	26	19	12	6
5	12	25	53	91	63	39	25	15	7
6	15	36	90	227	100	51	29	17	8
5	13	30	60	98	68	42	26	15	7
4	10	19	34	46	39	28	19	11	5
2	5	9	15	19	18	14	10	6	3