Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 19°C. We apply continuously 161°C heat to the field 9x3
What is the temperature (rounded to whole numbers) in the field 5x4 after 73 iterations according to the Gauss-Seidel iteration

Field in the beginning

19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19

Field after 4 iterations (rounded after 4th iteration)

3	4	5	6	6	6	6	6	7	7
4	8	9	11	11	11	11	14	21	24
5	9	12	13	14	14	17	27	51	73
6	11	13	15	16	17	22	41	91	221
6	11	14	16	17	18	23	36	58	77
6	11	14	16	17	18	21	27	34	32
6	11	14	16	17	18	19	21	21	16
6	10	13	14	15	16	16	16	14	9
4	7	10	11	12	12	12	11	9	5
2	4	5	6	6	6	6	6	4	2

Temperature in field 5x4 after 73 iterations:

19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19

3	4	5	6	6	6	6	6	7	7
4	8	9	11	11	11	11	14	21	24
5	9	12	13	14	14	17	27	51	73
6	11	13	15	16	17	22	41	91	221
6	11	14	16	17	18	23	36	58	77
6	11	14	16	17	18	21	27	34	32
6	11	14	16	17	18	19	21	21	16
6	10	13	14	15	16	16	16	14	9
4	7	10	11	12	12	12	11	9	5
2	4	5	6	6	6	6	6	4	2

19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19

3	4	5	6	6	6	6	6	7	7
4	8	9	11	11	11	11	14	21	24
5	9	12	13	14	14	17	27	51	73
6	11	13	15	16	17	22	41	91	221
6	11	14	16	17	18	23	36	58	77
6	11	14	16	17	18	21	27	34	32
6	11	14	16	17	18	19	21	21	16
6	10	13	14	15	16	16	16	14	9
4	7	10	11	12	12	12	11	9	5
2	4	5	6	6	6	6	6	4	2

19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19
19	19	19	19	19	19	19	19	19	19

3	4	5	6	6	6	6	6	7	7
4	8	9	11	11	11	11	14	21	24
5	9	12	13	14	14	17	27	51	73
6	11	13	15	16	17	22	41	91	221
6	11	14	16	17	18	23	36	58	77
6	11	14	16	17	18	21	27	34	32
6	11	14	16	17	18	19	21	21	16
6	10	13	14	15	16	16	16	14	9
4	7	10	11	12	12	12	11	9	5
2	4	5	6	6	6	6	6	4	2