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 102°C heat to the field 4x9
What is the temperature (rounded to whole numbers) in the field 7x7 after 58 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	7	7	6	5	2
5	8	10	12	12	12	12	11	8	4
6	10	13	15	16	16	16	14	11	6
7	12	15	17	18	18	18	16	12	6
7	12	16	18	19	19	19	17	13	7
7	12	16	18	20	20	20	18	13	7
7	12	16	19	23	23	21	18	13	7
6	11	16	25	34	30	24	19	13	6
5	10	19	38	63	43	27	17	11	5
3	7	18	49	143	52	23	12	6	3

Temperature in field 7x7 after 58 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	7	7	6	5	2
5	8	10	12	12	12	12	11	8	4
6	10	13	15	16	16	16	14	11	6
7	12	15	17	18	18	18	16	12	6
7	12	16	18	19	19	19	17	13	7
7	12	16	18	20	20	20	18	13	7
7	12	16	19	23	23	21	18	13	7
6	11	16	25	34	30	24	19	13	6
5	10	19	38	63	43	27	17	11	5
3	7	18	49	143	52	23	12	6	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	7	7	7	6	5	2
5	8	10	12	12	12	12	11	8	4
6	10	13	15	16	16	16	14	11	6
7	12	15	17	18	18	18	16	12	6
7	12	16	18	19	19	19	17	13	7
7	12	16	18	20	20	20	18	13	7
7	12	16	19	23	23	21	18	13	7
6	11	16	25	34	30	24	19	13	6
5	10	19	38	63	43	27	17	11	5
3	7	18	49	143	52	23	12	6	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	7	7	7	6	5	2
5	8	10	12	12	12	12	11	8	4
6	10	13	15	16	16	16	14	11	6
7	12	15	17	18	18	18	16	12	6
7	12	16	18	19	19	19	17	13	7
7	12	16	18	20	20	20	18	13	7
7	12	16	19	23	23	21	18	13	7
6	11	16	25	34	30	24	19	13	6
5	10	19	38	63	43	27	17	11	5
3	7	18	49	143	52	23	12	6	3