Number of keys on a piano

Number of keys on a piano (88 )

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Neat Ratios ...

Number of keys on a piano (88 )

is 1/250 of Pop. of Palau (21,680)...more
is 1/200 of Number of seats in the Hollywood Bowl auditorium (17,500 )...more
is 1/40 of Estimated world population of Indian Rhinoceros (3,560 individuals)...more
is 1/25 of Pop. of Christmas Island (2016) (2,205)...more
is 1/20 of Pop. of Norfolk Island (2016) (1,748)...more
is 1/5 of Number of nuclear power plants in the world (2022) (443 )...more
is 1/5 of Number of members of US House of Representatives (434 )...more
is 2.5 x Number of submarines in the North Korean Navy (2022) (35 )...more

If this was a standard unit ...