The length of the rectangle is 14 decimeters, the width is 4 decimeters less than the length, what is the perimeter?
长方形的长是14分米，宽比长少4分米，周长是多少分米．
<gadget id="calculator">14 - 4</gadget>
<output>10</output>

<gadget id="calculator">14 + 10</gadget>
<output>24</output>

<gadget id="calculator">24 * 2</gadget>
<output>48</output>

<result>48</result>