The \textbf{mean} of the following eight numbers is $$8$$. Find the missing number.  $$12$$~ $$4$$~ $$6$$~ $$4$$~ $$2$$~ $$9$$~\uline{~~~~~~~~~~}~$$7$$ 
Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Multiplication and Division->Understanding Meanings of Multiplication