Not Only Am I An Idiot, I'm Also A Liar

I've always told my Learners to come to me with things they don't understand and I will try to help them, as long as it's not math.

Yesterday one of them came to me, showed me this:

Field of View = low power FOV x magnification of low object lens
magnification of med. or high object lens

and said, "What does this mean?"

I'll tell you what it means. It means I can't do grade 8 science. I remember grade eight, and I remember not doing this in it. I also remember Bio 30 and I remember not doing this. I told her I would look it up and send her an email with the answer by eight at the latest.

After about an hour of google-ing, I found the answer and emailed it to her. And it was promptly sent back to me. So I tried it again, with a different letter, and it was returned. In this address there are two mystery letters that could either be "R" or "V"; and "U" or "W". I tried to send it with all the combinations and it refused to be delivered. Needless to say, I did not send the answer by eight o'clock. So now, she not only thinks I'm an idiot, but a liar as well.