Ginger and Amy both start with 100 pieces of Halloween candy. Ginger eats 4 pieces a day and Amy eats 3 pieces a day. How much more candy does Amy have after two weeks?
First find the the difference in the number of pieces of candy the two people each per day: 4 pieces/day - 3 pieces/day = 
<gadget id="calculator">4-3</gadget>
<output>1</output>
1 piece/day.
Then find the number of days in 2 weeks: 2 weeks * 7 days/week = 
<gadget id="calculator">2*7</gadget>
<output>14</output>
14 days.
Then multiply the difference per day by the number of days to find the total difference after 14 days: 1 piece/day * 14 days = 
<gadget id="calculator">1*14</gadget>
<output>14</output>
14 pieces.

<result>14</result>