So a computer science professor from the University of Reading has apparently shown that it’s possible to divide by zero, making all calculators and versions of Excel obsolete. But so what?
It’s a neat concept, but what can you do with it? He starts by saying that if a flight computer in a commercial airline encountered a “divide by zero” error in the programming, the plane would fall out of the sky — which is not necessarily true, but shocking statements like that will at least help get him in the news.  Next, he shows his equation by defining the value of 0/0 to be a new number called “nullity”, which “doesn’t exist on the number line.  So what are we supposed to do with this wayward number? If it doesn’t exist on the number line,
how is it going to help keep a plane in the sky? Instead of a calculator printing “Error”, it will print “nullity”. So what? What’s 3 x nullity?
Maybe it will have a use in physics and higher-level mathematics along side values like i and infinity. In the mean time, I’ll just assume he’s assigning a fun name to “divide by zero error”.