It's about the number of Kernels on an Ear of Corn.
(Corn, a.k.a. Maize; Kernel a.k.a. Seed) (average) (for Dent Corn, a.k.a. field corn)
It's about the number of Population of Vatican City.
In other words, the count of Population of Vatican City is 1 times 840.(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)
It's about one-and-one-tenth times the number of Inductees in the Rock and Roll Hall of Fame.
In other words, 840 is 1.12 times the count of Inductees in the Rock and Roll Hall of Fame, and the count of Inductees in the Rock and Roll Hall of Fame is 0.893 times that amount.(November, 2015 figures) (including individuals and groups)
As of November, 2015, there were 749 individuals in the Rock and Roll Hall of Fame. Artists and bands must have had at least 25 years of fame before being considered for induction in the Hall.
It's about one-and-three-tenths times the number of Members of Parliament (The U.K.).
In other words, the count of Members of Parliament (The U.K.) is 0.77 times 840.(a.k.a. MPs) (2016 figures) (formally "Members of the House of Commons of the Parliament of the United Kingdom of Great Britain and Northern Ireland")
It's about one-and-three-fifths times the number of Stores in the Mall of America.
In other words, the count of Stores in the Mall of America is 0.63 times 840.(a.k.a. MOA, a.k.a. MoA, a.k.a. Megamall) (Bloomington, Minnesota) (2015 figures) (approximate)
It's about one-and-four-fifths times the number of Olympic Gold Medals Won by the Soviet Union.
In other words, 840 is 1.78 times the count of Olympic Gold Medals Won by the Soviet Union, and the count of Olympic Gold Medals Won by the Soviet Union is 0.562 times that amount.(a.k.a. Union of Soviet Socialist Republics, a.k.a. USSR, a.k.a. Сою́з Сове́тских Социалисти́ческих Респу́блик, a.k.a. CCCP) (a.k.a. Olympic Games, a.k.a. Jeux olympiques) (Summer and Winter Games grand totals; excluding Russian Federation Medals) (1952 thru 1988 figures)
It's about three-fifths the number of Golf Courses in Florida.
In other words, 840 is 0.5534 times the count of Golf Courses in Florida, and the count of Golf Courses in Florida is 1.807 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.