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 140°C heat to the field 0x7
What is the temperature (rounded to whole numbers) in the field 0x0 after 70 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
5810111212121184
61012131414141295
1014151515151513105
2326221917161513105
6450342419171513105
1928243271916141294
65503221161311963
21221612976532

Temperature in field 0x0 after 70 iterations: