A rectangular garden is 50 meters long and 20 meters wide. Now increase the width of the garden by 10 meters and keep the length constant, what is the perimeter of the garden now?
一个长方形花园长50米，宽20米．现在把这个花园的宽加长10米，长不变，那么现在的这个花园的周长是多少米？
<gadget id="calculator">50 + 20 + 10</gadget>
<output>80</output>

<gadget id="calculator">80 * 2</gadget>
<output>160</output>

<result>160</result>