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 154°C heat to the field 4x1
What is the temperature (rounded to whole numbers) in the field 6x9 after 60 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	7	19	46	83	52	28	16	9	4
6	15	38	96	249	105	51	27	15	7
7	16	35	68	110	76	48	30	18	8
7	15	27	44	59	51	39	28	18	9
7	14	22	31	37	36	31	24	17	9
7	13	19	24	27	28	26	22	16	8
7	13	17	20	22	23	22	19	14	7
6	11	15	17	18	19	19	16	12	6
5	8	11	12	13	14	13	12	8	4
2	4	6	6	7	7	7	6	4	2

Temperature in field 6x9 after 60 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	7	19	46	83	52	28	16	9	4
6	15	38	96	249	105	51	27	15	7
7	16	35	68	110	76	48	30	18	8
7	15	27	44	59	51	39	28	18	9
7	14	22	31	37	36	31	24	17	9
7	13	19	24	27	28	26	22	16	8
7	13	17	20	22	23	22	19	14	7
6	11	15	17	18	19	19	16	12	6
5	8	11	12	13	14	13	12	8	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	7	19	46	83	52	28	16	9	4
6	15	38	96	249	105	51	27	15	7
7	16	35	68	110	76	48	30	18	8
7	15	27	44	59	51	39	28	18	9
7	14	22	31	37	36	31	24	17	9
7	13	19	24	27	28	26	22	16	8
7	13	17	20	22	23	22	19	14	7
6	11	15	17	18	19	19	16	12	6
5	8	11	12	13	14	13	12	8	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	7	19	46	83	52	28	16	9	4
6	15	38	96	249	105	51	27	15	7
7	16	35	68	110	76	48	30	18	8
7	15	27	44	59	51	39	28	18	9
7	14	22	31	37	36	31	24	17	9
7	13	19	24	27	28	26	22	16	8
7	13	17	20	22	23	22	19	14	7
6	11	15	17	18	19	19	16	12	6
5	8	11	12	13	14	13	12	8	4
2	4	6	6	7	7	7	6	4	2