Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 20°C. We apply continuously 187°C heat to the field 3x0
What is the temperature (rounded to whole numbers) in the field 0x4 after 99 iterations according to the Gauss-Seidel iteration

Field in the beginning

20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020
20202020202020202020

Field after 4 iterations (rounded after 4th iteration)

828852568936181063
11306411071412516105
1023425748362619136
918283534292419137
815212626252219147
713182122222118137
712161920201917137
611141617171715116
5810121313121184
2456776542

Temperature in field 0x4 after 99 iterations: