The side length of a square lawn is 20 meters. Xiaohong ran around the lawn twice. How many meters did she run in total? (5 meters)
一个正方形草坪的边长是20米．小红沿着这个草坪的四周跑了两圈．她一共跑了多少米？(5米)
<gadget id="calculator">20 * 4 * 2</gadget>
<output>160</output>

<result>160</result>