The units (grams, ounces, feet, meters, or whatever) should be carried 
along with the numbers, and then crossed out when able to cancel. Then 
remaining will be ONLY  the final units, which must be what you are 
looking for. :)

Gerhard Fiedler wrote:
> Hector Martin wrote:
>
>   
>> As an aside, I've found Google to be a very good aid when doing 
>> technical calculations like these, not only because it auto-handles 
>> units (which is useful but can get strange sometimes), but because if 
>> you mess up the units anywhere it will either not return an answer or 
>> give out the wrong units.
>>     
>
> Which is of course a general advantage of doing calculations with the
> proper units throughout (including conversion factors). In many cases,
> you'll see immediately when something is wrong. I'm glad that I was
> introduced to physics in high school this way and have it done like this
> ever since.
>
> Gerhard
>
>   
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