A rectangular pond is 120 meters long and 52 meters wide. There is a path along the sides of the pond. The path is about how many meters long.
长方形水塘长120米，宽52米，沿水塘四周有一条小路，小路大约长多少米米．
<gadget id="calculator">120 + 52</gadget>
<output>172</output>

<gadget id="calculator">172 * 2</gadget>
<output>344</output>

<result>344</result>