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    | • | 1. Identify the
    problem. 
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    |  | 
   
    | • | 2. Write down all
    conversion factors that let you 
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    |  | go from the given
    units to the units that you want 
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    |  | your answer to be
    in. (Or write down the relevant 
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    |  | equation.) 
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    |  | 
   
    | • | 3. Set up
    conversion factors so units cancel and 
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    |  | you’re left with
    the units you want your answer in. 
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    |  | (Or substitute in
    the eqn and solve.) 
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