<human>: We had a guy at work doing some magic tricks, he asked everyone who has an iPhone, took some guy's iPhone, played with it for less than 10 seconds and handed over back to the guy. The scientific calculator was opened.

Now the guy who does the magic trick, asks the guy who owns the iphoen to pass it around to random people, and then the guy who does the magic trick asks each person for a different number, stuff like 'pick any 2 digits from your birth date', 'divide by your shoe size' etc.. and then he passes it to the last person and asks him to press the '=' sign, when he does, he guesses the number.

Give me a shortened version of the text
<bot>: Do you guys know if its possible to preset a result in a scientific calculator (iPhone 3) that no matter what calculations you do, when you press = it displays a pre set result?