$$12\div\frac13=36$$. 
There are only lilies and roses in Bud\textquotesingle s garden. One third of the flowers are roses. There are 12 roses in total. How many flowers are there in Buds\textquotesingle s garden? 
Options:
a. $$12$$ 
b. $$16$$ 
c. $$20$$ 
d. $$24$$ 
e. $$36$$ 