John needs to take 2 pills a day.  One pill costs $1.5.  The insurance covers 40% of the cost.  How much does he pay in a 30-day month?
It cost 2*1.5=$
<gadget id="calculator">2*1.5</gadget>
<output>3</output>
3 a day.
So it cost 3*30=$
<gadget id="calculator">3*30</gadget>
<output>90</output>
90 per day.
Insurance covers 90*.4=$
<gadget id="calculator">90*.4</gadget>
<output>36</output>
36.
So he pays 90-36=$
<gadget id="calculator">90-36</gadget>
<output>54</output>
54 a month.

<result>54</result>