Start by putting  over :



     Now we want to cancel away the  and bring in
     .  We know that .  So there are
     two possible unit multipliers which we can make with
     that.  We can make the unit multiplier 
     or the unit multiplier .  The question
     is which one do we make.  Since we have  in the
     numerator, we must use the unit multiplier which has
      in the denominator so the 's will cancel.
     So we multiply by .  

 

     and then the 's cancel, like this




     Now we want to cancel away the  and bring in
     .  We know that .  So there are
     two possible unit multipliers which we can make with
     that.  We can make the unit multiplier 
     or the unit multiplier .  The question
     is which one do we make.  Since we have  in the
     numerator, we must use the unit multiplier which has
      in the denominator so the 's will cancel.
     So we multiply by .  


 
     Then the 's cancel:



     So we have left:



     Multiply the numerators and the denominators:









     You probably should round that off. Ask your teacher 
     how he or she wants it rounded.

     Edwin