It's about four-and-a-half times the number of Steps in the Sears Tower.
In other words, 9,900 is 4.6940 times the count of Steps in the Sears Tower, and the count of Steps in the Sears Tower is 0.2130 times that amount.(a.k.a. Willis Tower) (Chicago, Illinois) (steps per stairwell)
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 9,900.(a.k.a. The Coliseum, a.k.a. Flavian Amphitheatre, a.k.a. Amphitheatrum Flavium, a.k.a. Anfiteatro Flavio or Colosseo) (Rome) (estimated)
It's about one-fifth the number of Seats in New Yankee Stadium.
In other words, 9,900 is 0.196870 times the count of Seats in New Yankee Stadium, and the count of Seats in New Yankee Stadium is 5.0795 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-and-a-half times the number of Golf Courses in Florida.
In other words, 9,900 is 6.5220 times the count of Golf Courses in Florida, and the count of Golf Courses in Florida is 0.15330 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, 9,900 is 0.122620 times the count of Seats in Lambeau Field, and the count of Seats in Lambeau Field is 8.15530 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 0.10 times 9,900.(Corn, a.k.a. Maize; Kernel a.k.a. Seed) (average) (for Dent Corn, a.k.a. field corn)
It's about twelve times the number of Population of Vatican City.
In other words, 9,900 is 11.80 times the count of Population of Vatican City, and the count of Population of Vatican City is 0.0847 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.