The school playground is 50 meters long and 35 meters wide. Xiao Ming ran 2 laps around the school's rectangular playground. How many meters did he run in total?
学校操场长50米，宽35米，小明绕学校长方形的操场跑2圈，一共跑了多少米？
<gadget id="calculator">50 + 35</gadget>
<output>85</output>

<gadget id="calculator">85 * 2 * 2</gadget>
<output>340</output>

<result>340</result>