It means product.
so if you were given
1-(n-1 product symbol i=0) (1-((1/(2^(l*d))*(a)*(p)*(b-g)-i)
values for symbols
how would you solve it? i've got an answer which i know is probably wrong of
1-(n-1 product symbol i=0)(1-(1/8455716864*(2^(d*l))-i)
can i drop out of equation?