A rectangular pool is 20 meters long and 15 meters wide. Xiao Ming ran along it three times. How many meters did Xiao Ming run in total?
一个长方形水池，长20米，宽15米，小明沿着它跑了三圈，小明一共跑了多少米？
<gadget id="calculator">20 + 15</gadget>
<output>35</output>

<gadget id="calculator">35 * 2 * 3</gadget>
<output>210</output>

<result>210</result>