tabular - Vim Tabularize by // -

how align comments // vim tabular plugin?

double n; // number of steps double np; // number of particles double q; // probability of success 

i know it's easy align by, i.e., = :tab /=. :tab / // adds space between /'s , stops comment more:

double n;  /  / number of steps double np; /  / number of particles double q;  /  / probability of success 

:tabularize / \/\/ seems work.

here escaping slashes.