A piece of rectangular paper is 24 centimeters long and half as wide as it is, what is the perimeter of the paper in centimeters?
一张长方形纸，长是24厘米，宽是它的一半，这张纸的周长是多少厘米．
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">24 + 12</gadget>
<output>36</output>

<gadget id="calculator">36 * 2</gadget>
<output>72</output>

<result>72</result>