[Bruns-Herzog define *multiplicity*](http://math.stackexchange.com/questions/1215571/definition-of-multiplicity) When the ring and module are not necessarily graded as $e(M)=e(gr_m(M))$, see B-H 4.6.  
Many concepts in commutative algebra have known behavior in exact sequences, such as **Ass, supp, reduction and etc**. I wonder if there is known fact about behavior of multiplicity in exact sequences? I mean:  
>Let $M$ be an $R$-module, $K$ its submodule, and $N$ a factor module of $M$. is there a relationship between $e(M)$, $e(K)$ and $e(N)$?   
   
Thank you.