The length of the rectangle is 16 cm, and the length is 11 cm longer than the width. What is the perimeter of the rectangle in cm?
长方形的长是16厘米，比宽长11厘米，求这个长方形的周长是多少厘米？
<gadget id="calculator">16 - 11</gadget>
<output>5</output>

<gadget id="calculator">16 + 5</gadget>
<output>21</output>

<gadget id="calculator">21 * 2</gadget>
<output>42</output>

<result>42</result>