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 166°C heat to the field 9x5
What is the temperature (rounded to whole numbers) in the field 5x4 after 43 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	7
9	15	19	22	23	24	23	21	18	13
10	17	22	25	26	27	26	27	32	30
10	18	23	26	28	28	30	40	61	80
11	18	24	27	28	30	35	53	102	232
10	18	23	26	28	29	34	46	67	83
9	16	21	23	25	26	29	34	39	35
7	12	16	18	19	20	21	22	22	16
4	6	8	9	10	10	11	11	10	6

Temperature in field 5x4 after 43 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	7
9	15	19	22	23	24	23	21	18	13
10	17	22	25	26	27	26	27	32	30
10	18	23	26	28	28	30	40	61	80
11	18	24	27	28	30	35	53	102	232
10	18	23	26	28	29	34	46	67	83
9	16	21	23	25	26	29	34	39	35
7	12	16	18	19	20	21	22	22	16
4	6	8	9	10	10	11	11	10	6

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	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	7
9	15	19	22	23	24	23	21	18	13
10	17	22	25	26	27	26	27	32	30
10	18	23	26	28	28	30	40	61	80
11	18	24	27	28	30	35	53	102	232
10	18	23	26	28	29	34	46	67	83
9	16	21	23	25	26	29	34	39	35
7	12	16	18	19	20	21	22	22	16
4	6	8	9	10	10	11	11	10	6

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	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	7
9	15	19	22	23	24	23	21	18	13
10	17	22	25	26	27	26	27	32	30
10	18	23	26	28	28	30	40	61	80
11	18	24	27	28	30	35	53	102	232
10	18	23	26	28	29	34	46	67	83
9	16	21	23	25	26	29	34	39	35
7	12	16	18	19	20	21	22	22	16
4	6	8	9	10	10	11	11	10	6