The formula for g/day is a bit awkward and doesn't really give you an idea of what you can be making with it. Of course, that's at least in part because what you make from it will depend on if you process it and if you have Artisan or not. It will also depend on if we're talking out in the yard in Summer, in which case you have to factor in the days spent growing, or in the Greenhouse, where the initial growth phase is essentially trivial and will just continue producing daily until you uproot it.
With Artisan, and brewing into Pale Ale, assuming you have the infrastructure to support it, in the Greenhouse, hops can produce 420g/day. But that's a lot of assumptions. The website just figures base price for the crop itself with no modifiers. With the right setup in the greenhouse, with mostly hops and some interspersed Ancient Fruit (remember, Hops is a Trellis plant, you can't walk through them so you use Ancient Fruit as a pathway) and some Peach or Pomegranate trees, you can hit a million and a half per season, assuming it is all processed. And most of that comes from the hops.
The formula One More Day posted is the one the wiki uses. (Number of Harvests * base sell price) / 27.