A rectangular vegetable field has a length of 20 meters and a ratio of width to length of 8 meters. Xiaohong walked around the vegetable field twice, how many meters did she walk in total?
一块长方形菜地，长是20米，宽比长短是8米．小红绕这块菜地走了两圈，一共走了多少米？
<gadget id="calculator">20 - 8</gadget>
<output>12</output>

<gadget id="calculator">20 + 12</gadget>
<output>32</output>

<gadget id="calculator">32 * 2 * 2</gadget>
<output>128</output>

<result>128</result>