The width of a rectangular vegetable field is 30 meters, and the length is 10 meters more than twice the width. How many meters does it take to walk around the vegetable field?
长方形菜地的宽是30米，长是宽的2倍多10米．绕菜地走一圈，要走多少米？
<gadget id="calculator">2 * 30</gadget>
<output>60</output>

<gadget id="calculator">60 + 10 + 30</gadget>
<output>100</output>

<gadget id="calculator">100 * 2</gadget>
<output>200</output>

<result>200</result>