If the area of a rectangle is 16 square centimeters and the length is 8 centimeters, what is its perimeter in centimeters?
一个长方形的面积是16平方厘米，长是8厘米，它的周长是多少厘米．
<gadget id="calculator">16 / 8</gadget>
<output>2</output>

<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<result>20</result>