We enjoy poring over the latest issue of Forbes’ World Billionaires List as much as the next person, watching the billions stack up every year, but have you ever realistically considered what that kind of money could actually mean? We just did. And being in the business we’re in, we decided to count the dollars not in BigMac’s or iPhones, but rather in property. A whole lot of property.

We took the nation’s most expensive real estate market and sized it up against the world’s richest people. The result? Looks like however high Manhattan home prices climb, some people’s fortunes more than keep pace with them. So much so that just the first 12 richest entries on Forbes’ list could split up all of Manhattan’s residential stock between them, and still have a few cents left in their pockets.