I did the silliest mistake today.
I need to photocopy the letter 's' for my 22 students just now. The master copy consisted of 7 of the alphabet in question. So I would only need to photocopy (about) 4 pieces of the master copy,
But guess how many copies I made?
21 freaking copies! (21 copies with each copy consisting of 7 of the letter 's' . You do the math)
I seriously need to go home now.