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 74°C heat to the field 4x4
What is the temperature (rounded to whole numbers) in the field 7x0 after 126 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	11	11	11	9	7	4
7	12	15	18	21	21	20	17	13	7
9	15	21	29	36	34	29	24	17	9
10	18	29	46	68	53	40	30	21	10
11	21	36	68	143	74	48	34	23	11
11	21	34	53	74	59	45	34	23	12
11	20	29	40	48	45	38	31	22	11
9	17	24	30	34	34	31	26	18	9
7	13	17	21	23	23	22	18	13	6
4	7	9	10	11	12	11	9	6	3

Temperature in field 7x0 after 126 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	11	11	11	9	7	4
7	12	15	18	21	21	20	17	13	7
9	15	21	29	36	34	29	24	17	9
10	18	29	46	68	53	40	30	21	10
11	21	36	68	143	74	48	34	23	11
11	21	34	53	74	59	45	34	23	12
11	20	29	40	48	45	38	31	22	11
9	17	24	30	34	34	31	26	18	9
7	13	17	21	23	23	22	18	13	6
4	7	9	10	11	12	11	9	6	3

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	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	11	11	11	9	7	4
7	12	15	18	21	21	20	17	13	7
9	15	21	29	36	34	29	24	17	9
10	18	29	46	68	53	40	30	21	10
11	21	36	68	143	74	48	34	23	11
11	21	34	53	74	59	45	34	23	12
11	20	29	40	48	45	38	31	22	11
9	17	24	30	34	34	31	26	18	9
7	13	17	21	23	23	22	18	13	6
4	7	9	10	11	12	11	9	6	3

31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	31	31	31	31
31	31	31	31	31	31	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	11	11	11	9	7	4
7	12	15	18	21	21	20	17	13	7
9	15	21	29	36	34	29	24	17	9
10	18	29	46	68	53	40	30	21	10
11	21	36	68	143	74	48	34	23	11
11	21	34	53	74	59	45	34	23	12
11	20	29	40	48	45	38	31	22	11
9	17	24	30	34	34	31	26	18	9
7	13	17	21	23	23	22	18	13	6
4	7	9	10	11	12	11	9	6	3