Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 23°C. We apply continuously 152°C heat to the field 7x6
What is the temperature (rounded to whole numbers) in the field 4x4 after 81 iterations according to the Gauss-Seidel iteration

Field in the beginning

23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23

Field after 4 iterations (rounded after 4th iteration)

3	5	7	7	8	8	8	7	5	3
5	9	11	13	13	14	13	12	9	5
7	11	14	16	17	17	17	16	12	7
7	13	16	18	19	20	22	23	19	10
8	13	17	19	20	25	35	46	35	18
8	14	17	20	23	36	66	105	67	31
8	13	17	20	27	49	106	256	107	42
7	12	15	18	24	40	72	111	72	33
5	9	12	14	18	27	41	52	40	21
3	5	6	7	9	13	19	22	18	10

Temperature in field 4x4 after 81 iterations:

23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23

3	5	7	7	8	8	8	7	5	3
5	9	11	13	13	14	13	12	9	5
7	11	14	16	17	17	17	16	12	7
7	13	16	18	19	20	22	23	19	10
8	13	17	19	20	25	35	46	35	18
8	14	17	20	23	36	66	105	67	31
8	13	17	20	27	49	106	256	107	42
7	12	15	18	24	40	72	111	72	33
5	9	12	14	18	27	41	52	40	21
3	5	6	7	9	13	19	22	18	10

23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23

3	5	7	7	8	8	8	7	5	3
5	9	11	13	13	14	13	12	9	5
7	11	14	16	17	17	17	16	12	7
7	13	16	18	19	20	22	23	19	10
8	13	17	19	20	25	35	46	35	18
8	14	17	20	23	36	66	105	67	31
8	13	17	20	27	49	106	256	107	42
7	12	15	18	24	40	72	111	72	33
5	9	12	14	18	27	41	52	40	21
3	5	6	7	9	13	19	22	18	10

23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23
23	23	23	23	23	23	23	23	23	23

3	5	7	7	8	8	8	7	5	3
5	9	11	13	13	14	13	12	9	5
7	11	14	16	17	17	17	16	12	7
7	13	16	18	19	20	22	23	19	10
8	13	17	19	20	25	35	46	35	18
8	14	17	20	23	36	66	105	67	31
8	13	17	20	27	49	106	256	107	42
7	12	15	18	24	40	72	111	72	33
5	9	12	14	18	27	41	52	40	21
3	5	6	7	9	13	19	22	18	10