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 183°C heat to the field 8x1
What is the temperature (rounded to whole numbers) in the field 3x0 after 90 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	7	10	23	53	93	47
5	8	10	12	13	20	44	111	285	98
6	10	13	15	16	23	41	77	118	62
7	12	15	17	18	23	33	48	57	35
7	12	16	18	19	22	26	32	32	20
7	12	16	18	19	21	23	24	21	13
7	12	16	18	19	20	21	20	16	9
6	11	14	16	17	18	18	16	12	7
5	8	11	12	13	13	13	12	9	4
2	4	6	6	7	7	7	6	4	2

Temperature in field 3x0 after 90 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	7	10	23	53	93	47
5	8	10	12	13	20	44	111	285	98
6	10	13	15	16	23	41	77	118	62
7	12	15	17	18	23	33	48	57	35
7	12	16	18	19	22	26	32	32	20
7	12	16	18	19	21	23	24	21	13
7	12	16	18	19	20	21	20	16	9
6	11	14	16	17	18	18	16	12	7
5	8	11	12	13	13	13	12	9	4
2	4	6	6	7	7	7	6	4	2

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	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	7	10	23	53	93	47
5	8	10	12	13	20	44	111	285	98
6	10	13	15	16	23	41	77	118	62
7	12	15	17	18	23	33	48	57	35
7	12	16	18	19	22	26	32	32	20
7	12	16	18	19	21	23	24	21	13
7	12	16	18	19	20	21	20	16	9
6	11	14	16	17	18	18	16	12	7
5	8	11	12	13	13	13	12	9	4
2	4	6	6	7	7	7	6	4	2

21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	21	21	21	21
21	21	21	21	21	21	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	7	10	23	53	93	47
5	8	10	12	13	20	44	111	285	98
6	10	13	15	16	23	41	77	118	62
7	12	15	17	18	23	33	48	57	35
7	12	16	18	19	22	26	32	32	20
7	12	16	18	19	21	23	24	21	13
7	12	16	18	19	20	21	20	16	9
6	11	14	16	17	18	18	16	12	7
5	8	11	12	13	13	13	12	9	4
2	4	6	6	7	7	7	6	4	2