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 90°C heat to the field 1x2
What is the temperature (rounded to whole numbers) in the field 5x8 after 56 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)

10	20	17	13	10	9	8	7	5	3
28	57	41	27	20	16	14	12	8	4
51	149	68	39	26	21	18	15	11	6
33	65	50	36	27	23	20	17	12	6
20	35	34	30	26	23	21	18	13	7
13	22	25	25	23	22	21	18	13	7
9	16	20	21	21	21	20	18	13	7
7	13	16	18	18	18	18	15	11	6
5	9	11	13	13	14	13	11	8	4
3	5	6	7	7	7	7	6	4	2

Temperature in field 5x8 after 56 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

10	20	17	13	10	9	8	7	5	3
28	57	41	27	20	16	14	12	8	4
51	149	68	39	26	21	18	15	11	6
33	65	50	36	27	23	20	17	12	6
20	35	34	30	26	23	21	18	13	7
13	22	25	25	23	22	21	18	13	7
9	16	20	21	21	21	20	18	13	7
7	13	16	18	18	18	18	15	11	6
5	9	11	13	13	14	13	11	8	4
3	5	6	7	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

10	20	17	13	10	9	8	7	5	3
28	57	41	27	20	16	14	12	8	4
51	149	68	39	26	21	18	15	11	6
33	65	50	36	27	23	20	17	12	6
20	35	34	30	26	23	21	18	13	7
13	22	25	25	23	22	21	18	13	7
9	16	20	21	21	21	20	18	13	7
7	13	16	18	18	18	18	15	11	6
5	9	11	13	13	14	13	11	8	4
3	5	6	7	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

10	20	17	13	10	9	8	7	5	3
28	57	41	27	20	16	14	12	8	4
51	149	68	39	26	21	18	15	11	6
33	65	50	36	27	23	20	17	12	6
20	35	34	30	26	23	21	18	13	7
13	22	25	25	23	22	21	18	13	7
9	16	20	21	21	21	20	18	13	7
7	13	16	18	18	18	18	15	11	6
5	9	11	13	13	14	13	11	8	4
3	5	6	7	7	7	7	6	4	2