My cat's empty bowl weighs 420 grams. If I give my cat 60 grams per day and I always fill her bowl every 3 days, how much does her bowl weigh if after I ended up refilling her empty bowl she only ate 14 grams?
If I give my cat 60 grams per day and I fill it to last 3 days, then I put a total of 60*3 = 
<gadget id="calculator">60*3</gadget>
<output>180</output>
180 grams into her bowl.
If the empty bowl weighs 420 grams and I put 180 grams the total weight is = 420+180 = 
<gadget id="calculator">420+180</gadget>
<output>600</output>
600 grams.
If my cat only ate 14 grams then the bowl right now weighs 600-14 = 
<gadget id="calculator">600-14</gadget>
<output>586</output>
586 grams.

<result>586</result>