How to use roman numerals<br>Understand the concept of roman numerals. Roman numerals use fewer symbols than the number system you are used to. I is the number 1 (one), v is 5 (five), and x is 10 (ten), for example.
Roman numerals is the roman alphabet
( z1 alphabet :mod ( z2 country :name ( z3 name :op "Roman" :op "Empire" ) ) :domain ( z4 numerals :mod z2 ) )