The area of a rectangle is 15.2, if its length and width are reduced to the original (1/2), what is the area?
一个长方形的面积是15.2，如果把它的长和宽都缩小到原来的(1/2)，面积是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">15.2 * (1/2) * (1/2)</gadget>
<output>3.8</output>

<result>3.8</result>