I'm using the yeast pitch rate and starter calculator to determine how much yeast I'll need for my next brew day and something seems amiss. I'm making a stout with a high OG of 1.088, but just a 6 gallon batch, according to the calculator I'll need 7 packs of US-05 dry yeast or 80 grams. That just seems extraordinarily high. I looked up Safale US-05 and the manufacturer confirmed cell density at 6 billion cells / gram. What am I missing here?