Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 18°C. We apply continuously 69°C heat to the field 4x5
What is the temperature (rounded to whole numbers) in the field 0x2 after 138 iterations according to the Gauss-Seidel iteration

Field in the beginning

18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18

Field after 4 iterations (rounded after 4th iteration)

3	4	5	6	6	6	6	5	4	2
4	7	9	10	11	11	11	10	7	4
5	9	11	14	16	16	15	13	10	5
6	10	14	21	27	25	21	17	12	6
6	12	20	35	55	41	29	20	14	7
6	13	26	54	124	60	35	23	15	7
6	13	23	39	59	44	31	22	14	7
6	11	18	26	33	30	24	18	12	6
4	8	12	16	19	19	16	13	9	4
2	4	6	8	9	9	8	6	4	2

Temperature in field 0x2 after 138 iterations:

18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18

3	4	5	6	6	6	6	5	4	2
4	7	9	10	11	11	11	10	7	4
5	9	11	14	16	16	15	13	10	5
6	10	14	21	27	25	21	17	12	6
6	12	20	35	55	41	29	20	14	7
6	13	26	54	124	60	35	23	15	7
6	13	23	39	59	44	31	22	14	7
6	11	18	26	33	30	24	18	12	6
4	8	12	16	19	19	16	13	9	4
2	4	6	8	9	9	8	6	4	2

18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18

3	4	5	6	6	6	6	5	4	2
4	7	9	10	11	11	11	10	7	4
5	9	11	14	16	16	15	13	10	5
6	10	14	21	27	25	21	17	12	6
6	12	20	35	55	41	29	20	14	7
6	13	26	54	124	60	35	23	15	7
6	13	23	39	59	44	31	22	14	7
6	11	18	26	33	30	24	18	12	6
4	8	12	16	19	19	16	13	9	4
2	4	6	8	9	9	8	6	4	2

18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18
18	18	18	18	18	18	18	18	18	18

3	4	5	6	6	6	6	5	4	2
4	7	9	10	11	11	11	10	7	4
5	9	11	14	16	16	15	13	10	5
6	10	14	21	27	25	21	17	12	6
6	12	20	35	55	41	29	20	14	7
6	13	26	54	124	60	35	23	15	7
6	13	23	39	59	44	31	22	14	7
6	11	18	26	33	30	24	18	12	6
4	8	12	16	19	19	16	13	9	4
2	4	6	8	9	9	8	6	4	2