Editing Esperanto grammar (section)

===Compound numerals and derivatives===
Tens and hundreds are pronounced and written together with their multipliers as one word, while all other parts of a number are pronounced and written separately (''dudek'' 20, ''dek du'' 12, ''dudek du'' 22, ''dek du mil'' 12,000).<ref>[https://bertilow.com/pmeg/gramatiko/nombroj/vortetoj/formoj.html ''Plena Manlibro de Esperanta Gramatiko'']</ref> Ordinals are formed with the adjectival suffix ''-a,'' quantities with the nominal suffix ''-o,'' multiples with ''-obl-,'' fractions with ''‑on‑'', collectives with ''‑op‑'', and repetitions with the root ''‑foj‑''.

:''sescent sepdek kvin'' (675)
:''tria'' (third [as in ''first, second, third''])
:''trie'' (thirdly)
:''dudeko'' (a score [20])
:''duobla'' (double)
:''kvarono'' (one fourth, a quarter)
:''duope'' (by twos)
:''dufoje'' (twice)

The particle ''po'' is used to mark distributive numbers, that is, the idea of distributing a certain number of items to each member of a group:
:''mi donis al ili po tri pomojn'' or ''pomojn mi donis al ili po tri'' (I gave [to] them three apples each).

Note that particle ''po'' forms a phrase with the numeral ''tri'' and is not a preposition for the noun phrase ''tri pomojn,'' so it does not prevent a grammatical object from taking the accusative case.