Lao Zhang runs 7 laps around a square garden with a side length of 20 meters every day. How many meters did he run in one day?
老张每天围着一个边长20米的正方形花园跑7圈，他一天共跑了多少米？
<gadget id="calculator">20 * 4 * 7</gadget>
<output>560</output>

<result>560</result>