Deritiaves HP12c question - need help

There is a deritatives formula that has: e rct (with the rct as superscript/exponential). The r is the risk free rate, the t is the total time of the contract, however for the life of me I cannot figure out what the e is. More importantly, I am trying to figure out how to calculate vis a vis hp12c. For example, e .0296(.547945) should equal 1.01635 (the figures to the right of the e are exponential). Can somebody please provide me with the keystrokes. Sorry in advance if this is a boneheaded question. Regards, Mike

Never mind, I figured it out. You know you’re in bad shape when you catch yourself waking up as opposed to nodding off.