Dana:  You 're cheating .
Terry McGinnis: Am not .
Dana: You have to be cheating . There 's no way you could know something like that without a calculator .
Terry McGinnis: People used to .
Dana: You 're saying you memorized the multiplication tables ? What for ?
Terry McGinnis: My dad was a scientist . Guess he wanted me to be ready for anything .
Dana: 15 times 15 .
Terry McGinnis: _ 225 _ .