Dad ran 2 laps around a square flower bed with a side length of 20 meters. How many meters did he run in total?
爸爸绕着边长是20米的正方形花坛跑了2圈，他一共跑了多少米．
<gadget id="calculator">20 * 4 * 2</gadget>
<output>160</output>

<result>160</result>