If the width of a rectangle is 10 cm and the length is 2 cm longer than the width, what is the perimeter in cm?
一个长方形的宽是10厘米，长比宽多2厘米，则周长是多少厘米．
<gadget id="calculator">10 + 2 + 10</gadget>
<output>22</output>

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

<result>44</result>