And if I got really close, 1.9999999999 squared, what am I going to get to? It's not actually going to be exactly 4. This calculator just rounded things up. It's going to get to a number really, really, really, really, really, really, really close to 4. And we can do something from the positive direction, too. And it actually has to be the same number when we approach from the below what we're trying to approach and above what we're trying to approach. So if we try 2.1 squared, we get 4.4.