$6\times4+4\times2+3\times6=50$ 
In the teachers\textquotesingle{} lounge there are $$6$$ tables with $$4$$ chairs by each one, $$4$$ tables with $$2$$ chairs by each, and $$3$$ tables with $$6$$ chairs by each. How many chairs are there in the lounge? (2003 Math Kangaroo Problem, Level 3-4, Question \#5) 
Options:
a) $$40$$ 
b) $$25$$ 
c) $$50$$ 
d) $$36$$ 
e) $$44$$ 