A rectangular playground is 82 meters long and 68 meters wide. Xiaohua ran four laps around the playground. How many meters did he run in total?
一个长方形的操场长82米，宽68米，小华沿着操场周边跑四圈，一共跑了多少米？
<gadget id="calculator">82 + 68</gadget>
<output>150</output>

<gadget id="calculator">150 * 2</gadget>
<output>300</output>

<gadget id="calculator">300 * 4</gadget>
<output>1_200</output>

<result>1_200</result>