vhdl -division program

numerator is 10 bits of binary which i convert it into integer ,then denominator is directly i have taken as integer (i.e) 20

and i dont know how to use look up table because my coding is like loop for example

my coding contains

xkcap0(0)=conv_std_logic_vector((conv_integer(fn(0))*conv_integer(xkcap0(0))/20......................

and so on.........

here fn(0) is of 6 bits and initially xkcap0(0) is of 10 bits which is 0 initially. here xkcap(0) is also used inside the coding .....so how to calculate data for look up table because each and every time xkcap(0) will change