text: const RomanNumber = require("./roman.js");
  
  const rn1 = new RomanNumber(2999);
  const rn2 = RomanNumber("MCMLXXX");
  
  console.log(`${rn1.toInt()} in Roman is: ${rn1.toString()}`);
  console.log(`${rn2.toString()} in Arabic is: ${rn2.toInt()}`);
  