John buys 20 bars of soap each weighing 1.5 pounds for $.5 per pound.  How much money did he spend on soap?
He bought 20*1.5=
<gadget id="calculator">20*1.5</gadget>
<output>30</output>
30 pounds of soap.
That cost 30*.5=$
<gadget id="calculator">30*.5</gadget>
<output>15</output>
15.

<result>15</result>