A rectangular piece of colored paper is 8 decimeters long and half as wide as it is long. What is the area of the paper?
一张长方形的彩纸长8分米，宽是长的一半，这张纸的面积是多少．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>