Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 23°C. We apply continuously 66°C heat to the field 1x2
What is the temperature (rounded to whole numbers) in the field 5x6 after 76 iterations according to the Gauss-Seidel iteration

Field in the beginning

23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23

Field after 4 iterations (rounded after 4th iteration)

9	16	15	12	10	9	8	7	5	3
22	45	34	24	19	16	14	12	9	5
39	113	55	34	25	21	19	16	12	6
26	52	42	32	26	23	21	18	13	7
17	30	31	28	26	24	22	19	14	7
12	21	24	25	24	23	22	20	15	8
9	16	20	22	22	22	21	19	14	7
8	13	17	19	19	20	19	17	12	6
5	10	12	14	14	15	14	12	9	4
3	5	6	7	8	8	7	6	4	2

Temperature in field 5x6 after 76 iterations:

23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23

9	16	15	12	10	9	8	7	5	3
22	45	34	24	19	16	14	12	9	5
39	113	55	34	25	21	19	16	12	6
26	52	42	32	26	23	21	18	13	7
17	30	31	28	26	24	22	19	14	7
12	21	24	25	24	23	22	20	15	8
9	16	20	22	22	22	21	19	14	7
8	13	17	19	19	20	19	17	12	6
5	10	12	14	14	15	14	12	9	4
3	5	6	7	8	8	7	6	4	2

23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23

9	16	15	12	10	9	8	7	5	3
22	45	34	24	19	16	14	12	9	5
39	113	55	34	25	21	19	16	12	6
26	52	42	32	26	23	21	18	13	7
17	30	31	28	26	24	22	19	14	7
12	21	24	25	24	23	22	20	15	8
9	16	20	22	22	22	21	19	14	7
8	13	17	19	19	20	19	17	12	6
5	10	12	14	14	15	14	12	9	4
3	5	6	7	8	8	7	6	4	2

23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23

9	16	15	12	10	9	8	7	5	3
22	45	34	24	19	16	14	12	9	5
39	113	55	34	25	21	19	16	12	6
26	52	42	32	26	23	21	18	13	7
17	30	31	28	26	24	22	19	14	7
12	21	24	25	24	23	22	20	15	8
9	16	20	22	22	22	21	19	14	7
8	13	17	19	19	20	19	17	12	6
5	10	12	14	14	15	14	12	9	4
3	5	6	7	8	8	7	6	4	2