John gets a new EpiPen every 6 months.  They cost $500 and insurance covers 75%.  How much does he pay per year?
He needs to buy 12/6=
<gadget id="calculator">12/6</gadget>
<output>2</output>
2 per year.
Insurance covers 500*.75=$
<gadget id="calculator">500*.75</gadget>
<output>375</output>
375.
So he pays 500-375=$
<gadget id="calculator">500-375</gadget>
<output>125</output>
125.
So he pays 125*2=$
<gadget id="calculator">125*2</gadget>
<output>250</output>
250.

<result>250</result>