I'd be there all day trying to estimate roots in my head, depending on the accuracy they'll accept for the estimate. I think this is a great idea, though - too

I'd be there all day trying to estimate roots in my head, depending on the accuracy they'll accept for the estimate. I think this is a great idea, though - too many times I've caught an in put error simply because the answer was an order of magnitude or two off - or I had forgotten to convert units.