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 are used in other countries too 
( z1 use :ARG1 ( z2 numeral :mod ( z3 country :name ( z4 name :op "Roman" :op "Empire" ) ) ) :location ( z5 country :mod ( z6 other ) ) :mod ( z7 too ) )