Arabic numerals are called that because the European interpretation of those numbers comes from the Arabs. The numerals are called Arabic numerals (even though they do not resemble modern Arabic numerals in the slightest) to distinguish them from Roman numerals.

30 in Arabic numerals is ٣٠

The Roman numerals lvi or LVI converted into Arabic numerals are 56

The Roman numerals LXVII=67 in Hindu Arabic numerals.

In Arabic numerals, it is 616.

In Roman numerals, it is DCXVI.