A rectangular vegetable field is 10 meters wide, and the ratio of the width to the length is 5 meters. What is the perimeter of the vegetable field?
一块长方形的菜地，宽是10米，宽比长短5米，这块菜地的周长是多少．
<gadget id="calculator">10 + 10 + 5</gadget>
<output>25</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<result>50</result>