It's about two-fifths the number of Kernels on an Ear of Corn.
In other words, the count of Kernels on an Ear of Corn is 3 times 312.(Corn, a.k.a. Maize; Kernel a.k.a. Seed) (average) (for Dent Corn, a.k.a. field corn)
An average ear of dent corn, the kind grown to feed to animals and to make other foods, has an average of 800 kernels. Each acre of corn yields about 15,900 ears of corn.
It's about two-and-a-half times the number of Elements on the Periodic Table.
In other words, 312 is 2.640 times the count of Elements on the Periodic Table, and the count of Elements on the Periodic Table is 0.3790 times that amount.(a.k.a. Periodic Table of the Elements, a.k.a chemical elements) (confirmed elements as of 2016)
It's about two-fifths the number of Population of Vatican City.
In other words, 312 is 0.3710 times the count of Population of Vatican City, and the count of Population of Vatican City is 2.70 times that amount.(a.k.a. Vatican City State, a.k.a. Stato della Città del Vaticano, a.k.a. Status Civitatis Vaticanae) (Rome, Italy) (2014 estimates; permanent residents only)
Vatican City, the seat of the Roman Catholic Church, is the smallest internationally recognized state in the world, with a population of just 842 people (according to a 2004 estimate). Each year, approximately 18 million tourists visit The City.
It's about three times the number of Wolves in Yellowstone National Park.
In other words, the count of Wolves in Yellowstone National Park is 0.3330 times 312.(a.k.a. Henihco'oo; a.k.a. Héetíhco'oo) (December 2014 figures; Wyoming Park area)
As of the 2014 population count, there were 104 wolves living in Yellowstone National Park, in twelve packs. All of the wolves now living in the Park are thought to have descended from the 66 wolves (re)introduced into the Park in 1995-96.
It's about three-and-a-half times the number of Keys on a Piano.
In other words, the count of Keys on a Piano is 0.290 times 312.(Moden layout; A0 to C7)
It's about four-and-a-half times the number of Submarines in the US Navy.
In other words, the count of Submarines in the US Navy is 0.230 times 312.(a.k.a. Subs) (includes all types, all classes) (2015 figures)
It's about one-fifth the number of Golf Courses in Florida.
In other words, 312 is 0.20550 times the count of Golf Courses in Florida, and the count of Golf Courses in Florida is 4.8660 times that amount.(2016 figures) (public and private)