This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Is your submit button in a form ? If so, add hidden tags to your form, one with the value of 'd', and another one with the value of 'e'. After submitting, get the value of the hidden tags, and multiply.