The Roman numeral CMLXXVIII corresponds to the Arabic number 978.
CMLXXVIII = 978
Symbols are written and read from left to right, from highest to lowest.
If number CMLXXVIII is within to text or sentence it should be read in its equivalent in Arabic numbers, in this case 978.
CMLXXVII is number 977
CMLXXIX is number 979
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