A rectangular vegetable field is 27 meters wide and 17 meters shorter than its length. What is the perimeter of this rectangular vegetable field in meters?
一块长方形菜地，宽是27米，比长短17米，这块长方形菜地的周长是多少米．
<gadget id="calculator">27 + 17 + 27</gadget>
<output>71</output>

<gadget id="calculator">71 * 2</gadget>
<output>142</output>

<result>142</result>