I guess you are referring to converting Roman Numerals to "normal" numbers:
LXXVIII = L + X + X + V + I + I + I
= 50 + 10 +10 + 5 + 1 + 1 + 1
= 78
It doesn't stand for bananas.
3000
elementary maths
metre
It doesn't "stand for" anything. And wrong category.
maths economics comers
An unknown number.
LCM stand for Least Common Multiple
Base times Height
in maths it denotes as10
Terrible teachers failing maths
Right Hand Side [of an equation]