It is known that the length of a rectangle is 14 cm and the width is 8 cm. What is the perimeter of the rectangle?
已知一个长方形的长是14cm，宽是8cm，这个长方形的周长是多少．
<gadget id="calculator">14 + 8</gadget>
<output>22</output>

<gadget id="calculator">22 * 2</gadget>
<output>44</output>

<result>44</result>