Tim buys 3 dozen eggs.  Eggs cost $.50 each.  How much did he pay for eggs?
He bought 3*12=
<gadget id="calculator">3*12</gadget>
<output>36</output>
36 eggs.
So they cost 36*.5=$
<gadget id="calculator">36*.5</gadget>
<output>18</output>
18.

<result>18</result>