Calculator

I glance at my screen and scribble down the answer.  Then I hesitate and check again, finger rapidly punching keys.  I smile and continue on with my homework.  A face changes, a word darts out.  My eyes glance up.  Indeed.  Once more I check the answer on my screen, type a few more numbers.  Check.  I resume until the person in front of me says something else to change my mind.  And so I continue, checking and rechecking the answer I've concluded for the people around me:  the answer of who they are.