Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 31°C. We apply continuously 145°C heat to the field 9x6
What is the temperature (rounded to whole numbers) in the field 9x4 after 144 iterations according to the Gauss-Seidel iteration

Field in the beginning

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31

Field after 4 iterations (rounded after 4th iteration)

4	7	9	10	10	11	10	9	7	4
7	12	15	17	18	18	18	16	12	6
9	15	19	22	23	24	23	21	16	9
10	17	22	25	26	27	26	23	20	14
10	18	23	26	28	28	28	28	31	28
11	18	24	27	28	29	31	39	56	71
10	18	23	26	28	29	34	49	91	203
9	16	21	23	25	26	30	41	58	72
7	12	16	18	19	20	22	27	32	29
4	6	8	9	10	10	11	13	14	11

Temperature in field 9x4 after 144 iterations:

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31

4	7	9	10	10	11	10	9	7	4
7	12	15	17	18	18	18	16	12	6
9	15	19	22	23	24	23	21	16	9
10	17	22	25	26	27	26	23	20	14
10	18	23	26	28	28	28	28	31	28
11	18	24	27	28	29	31	39	56	71
10	18	23	26	28	29	34	49	91	203
9	16	21	23	25	26	30	41	58	72
7	12	16	18	19	20	22	27	32	29
4	6	8	9	10	10	11	13	14	11

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31

4	7	9	10	10	11	10	9	7	4
7	12	15	17	18	18	18	16	12	6
9	15	19	22	23	24	23	21	16	9
10	17	22	25	26	27	26	23	20	14
10	18	23	26	28	28	28	28	31	28
11	18	24	27	28	29	31	39	56	71
10	18	23	26	28	29	34	49	91	203
9	16	21	23	25	26	30	41	58	72
7	12	16	18	19	20	22	27	32	29
4	6	8	9	10	10	11	13	14	11

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31

4	7	9	10	10	11	10	9	7	4
7	12	15	17	18	18	18	16	12	6
9	15	19	22	23	24	23	21	16	9
10	17	22	25	26	27	26	23	20	14
10	18	23	26	28	28	28	28	31	28
11	18	24	27	28	29	31	39	56	71
10	18	23	26	28	29	34	49	91	203
9	16	21	23	25	26	30	41	58	72
7	12	16	18	19	20	22	27	32	29
4	6	8	9	10	10	11	13	14	11