Sadly, most beer drinkers that just want alcohol content don't know how to do math. Go look at your Natty Ice. It's what, 3.2? I haven't bought any for a long time, and don't drink beer just to get drunk. The Dundee Porter I had last night was 6.8. Now, if you start doing cost analysis, you might be surprised at which beer to buy.
Or just go with Nash's recommendation and get some turpentine.