Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 16°C. We apply continuously 144°C heat to the field 5x6
What is the temperature (rounded to whole numbers) in the field 5x7 after 42 iterations according to the Gauss-Seidel iteration

Field in the beginning

16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616
16161616161616161616

Field after 4 iterations (rounded after 4th iteration)

2455555542
4689999863
5810111213131184
59111316191916116
59121728413525168
591428579665392210
510183995240104522712
5916326410371432411
47122136484028178
246101620181494

Temperature in field 5x7 after 42 iterations: