A juggler can juggle 16 balls.  Half of the balls are golf balls, and half of the golf balls are blue.  How many blue golf balls are there?
Golf Balls:16/2=
<gadget id="calculator">16/2</gadget>
<output>8</output>
8.
Blue Golf Balls:8/2=
<gadget id="calculator">8/2</gadget>
<output>4</output>
4 balls.

<result>4</result>