A rectangular flower bed is 10 meters wide and twice as long as it is wide. How many meters does Xiaoya walk around the flower bed?
一个长方形花坛，宽为10米，长是宽的2倍．小亚沿花坛四周走一圈，要走多少米？
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">20 + 10</gadget>
<output>30</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<result>60</result>