We will go from  to  to .

By definition




We start with .  Write that over :



Now we make a fraction to multiply that by so that
the  cancels out and  comes in.  To do that we
make a fraction using .  We
put the   on the bottom so it will cancel
with the oz, and  on the bottom so
as to bring in 

So we want to multiply by the fraction 

x

and as you see the  on the top of the first fraction
cancels out with the  in the bottom of the second fraction:

x

Now we make a fraction to multiply that by so that
the  cancels out and  comes in.  To do that we
make a fraction using .  We
put the   on the bottom so it will cancel
with the , and  on the top so
as to bring in 

So we want to multiply by the fraction 

xx

and as you see the  on the top of the second fraction
cancels out with the  in the bottom of the third fraction:

xx

So all that's left is



Then you get a calculator and you should get:



and you should round that to 

Edwin