A rectangular playground is 100 meters long and 60 meters wide. Xiao Ming ran 2 laps along the playground, how many meters did he run in total?
一个长方形操场长100米，宽60米，小明沿操场跑了2圈，一共跑了多少米．
<gadget id="calculator">100 + 60</gadget>
<output>160</output>

<gadget id="calculator">160 * 2 * 2</gadget>
<output>640</output>

<result>640</result>