738 in roman numerals is DCCXXXVIII. DCCXXXVIII in arabic numerals is 738.Steps to convert from DCCXXXVIII to 738:DCCXXXVIII = 500 + CCXXXVIII CCXXXVIII = 100 + CXXXVIII CXXXVIII = 100 + XXXVIII XXXVIII = 10 + XXVIII XXVIII = 10 + XVIII XVIII = 10 + VIII VIII = 5 + III...