It's about four-and-a-half times the number of Steps in the Sears Tower.
In other words, 9,000 is 4.267 times the count of Steps in the Sears Tower, and the count of Steps in the Sears Tower is 0.2344 times that amount.(a.k.a. Willis Tower) (Chicago, Illinois) (steps per stairwell)
The Sears Tower extends 108 stories into the sky above the city of Chicago and includes 2,109 steps in each of its stairwells. Each year, more than 1.3 million visitors make the trip to an observation area called the Skydeck on the 103rd floor.
It's about one-fifth the number of Seats in The Colosseum.
In other words, the count of Seats in The Colosseum is 5 times 9,000.(a.k.a. The Coliseum, a.k.a. Flavian Amphitheatre, a.k.a. Amphitheatrum Flavium, a.k.a. Anfiteatro Flavio or Colosseo) (Rome) (estimated)
Built between 70 and 80 AD, The Colosseum was a central attraction of Rome, capable of seating 50,000 spectators for various events including plays, war reenactments, and gladiatorial matches. The structure was estimated to require 100,000 cu. m of stone to construct. It remains the largest amphitheater in the world.
It's about one-fifth the number of Seats in New Yankee Stadium.
In other words, 9,000 is 0.17897 times the count of Seats in New Yankee Stadium, and the count of Seats in New Yankee Stadium is 5.5875 times that amount.(2014 figures for 2009 Stadium; seating figures only) (a.k.a. Yankee Stadium, a.k.a. The Stadium, a.k.a. The House that George Built) (South Bronx, New York City, New York)
New Yankee Stadium has a seating capacity of 50,287. The Stadium was built between 2006 and 2009 out of 11,000 pieces of Indiana limestone.
It's about six times the number of Golf Courses in Florida.
In other words, 9,000 is 5.929 times the count of Golf Courses in Florida, and the count of Golf Courses in Florida is 0.1687 times that amount.(2016 figures) (public and private)
The US state of Florida includes 1,518 golf courses in its 170,000 sq. km area. The state is also the home of the headquarters of the Professional Golfers' Association (PGA) of America, which boasts a membership of 28,000 professional golfers.
It's about one-tenth the number of Seats in Lambeau Field.
In other words, 9,000 is 0.11148 times the count of Seats in Lambeau Field, and the count of Seats in Lambeau Field is 8.9702 times that amount.(2014 figures) (a.k.a. City Stadium, a.k.a. New City Stadium, a.k.a. Titletown USA, a.k.a. The Frozen Tundra, a.k.a. The Shrine of Pro Football) (Green Bay, Wisconsin)
Lambeau Field, home of the Green Bay Packers NFL team, can accommodate 80,735 spectators. With 58 years of occupancy by the Packers, Lambeau Field holds the record as the longest consecutive home of any NFL team.
It's about ten times the number of Kernels on an Ear of Corn.
In other words, the count of Kernels on an Ear of Corn is 0.1 times 9,000.(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 ten-and-a-half times the number of Population of Vatican City.
In other words, the count of Population of Vatican City is 0.0935 times 9,000.(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.