Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 21°C. We apply continuously 148°C heat to the field 4x4
What is the temperature (rounded to whole numbers) in the field 8x1 after 82 iterations according to the Gauss-Seidel iteration

Field in the beginning

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21

Field after 4 iterations (rounded after 4th iteration)

3	5	6	7	8	8	8	7	5	3
5	8	10	14	18	18	16	13	9	5
6	10	17	29	42	37	28	20	13	7
7	14	29	60	101	70	44	29	18	9
8	18	42	101	250	111	59	35	21	10
8	18	37	70	111	79	52	34	21	10
8	16	28	44	59	52	40	29	19	9
7	13	20	29	35	34	29	22	15	7
5	9	13	18	21	21	19	15	10	5
3	5	7	9	10	10	9	7	5	3

Temperature in field 8x1 after 82 iterations:

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21

3	5	6	7	8	8	8	7	5	3
5	8	10	14	18	18	16	13	9	5
6	10	17	29	42	37	28	20	13	7
7	14	29	60	101	70	44	29	18	9
8	18	42	101	250	111	59	35	21	10
8	18	37	70	111	79	52	34	21	10
8	16	28	44	59	52	40	29	19	9
7	13	20	29	35	34	29	22	15	7
5	9	13	18	21	21	19	15	10	5
3	5	7	9	10	10	9	7	5	3

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21

3	5	6	7	8	8	8	7	5	3
5	8	10	14	18	18	16	13	9	5
6	10	17	29	42	37	28	20	13	7
7	14	29	60	101	70	44	29	18	9
8	18	42	101	250	111	59	35	21	10
8	18	37	70	111	79	52	34	21	10
8	16	28	44	59	52	40	29	19	9
7	13	20	29	35	34	29	22	15	7
5	9	13	18	21	21	19	15	10	5
3	5	7	9	10	10	9	7	5	3

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21

3	5	6	7	8	8	8	7	5	3
5	8	10	14	18	18	16	13	9	5
6	10	17	29	42	37	28	20	13	7
7	14	29	60	101	70	44	29	18	9
8	18	42	101	250	111	59	35	21	10
8	18	37	70	111	79	52	34	21	10
8	16	28	44	59	52	40	29	19	9
7	13	20	29	35	34	29	22	15	7
5	9	13	18	21	21	19	15	10	5
3	5	7	9	10	10	9	7	5	3