evidence: Next time you savor a McDonald’s french fry, remember to thank Bill Gates for the tasty spud. As reported in The Post, the soon-to-be single computer magnate happens to own more farmland than anyone else in the United States. Known for loving fast food — although his burger of choice comes from the Washington-based chainlet Burgermaster — Gates, according to NBC News, grows potatoes for McDonald’s in fields so vast they can be scoped from outer space. [...] Considering that Gates is said to own 269,000 acres of fertile land in 18 states, it’s easy to imagine him keeping track of it all on some souped-up series of spreadsheets. If so, gangs of divorce lawyers — including some who worked on the Jeff Bezos bust-up — have surely been scrutinizing the potato haul. Gates, the fourth-richest person in the world, married his impending ex, Melinda, without a prenuptial agreement, so they will be splitting property via a so-called "separation contract."