The length of a rectangle is 10 cm, the width is 6 cm, what is the perimeter in cm?
一个长方形长是10cm，宽是6cm，周长是多少cm．
<gadget id="calculator">10 + 6</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<result>32</result>