Jake splits 8 shots of vodka with his friend.  Each shot of vodka is 1.5 ounces.  If the vodka is 50% pure alcohol, how much pure alcohol did Jake drink?
Jake drank 8/2=
<gadget id="calculator">8/2</gadget>
<output>4</output>
4 shots.
So he drank 4*1.5=
<gadget id="calculator">4*1.5</gadget>
<output>6</output>
6 ounces of vodka.
That means he drank 6*.5=
<gadget id="calculator">6*.5</gadget>
<output>3</output>
3 ounces of pure alcohol.

<result>3</result>