Every time Carl earned $0.50 he would go to the corner market and buy a candy bar.  Carl's neighbor said he would pay him $0.75 every week for taking out his trash.  At the end of four weeks, how many candy bars will Carl be able to buy?
He is paid $0.75 every week for 4 weeks, so Carl made .75 * 4 = $
<gadget id="calculator">.75*4</gadget>
<output>3</output>
3.00 in 4 weeks.
Each candy bar cost $0.50 and he made $3.00 so 3.00/.50 = 
<gadget id="calculator">3.00/.50</gadget>
<output>6</output>
6 candy bars.

<result>6</result>