A rectangular playground is 100 meters long and 60 meters wide. Xiao Ming runs around the playground twice every morning. How many meters does Xiao Ming run every morning?
一个长方形操场，长100米，宽60米．小明每天早上都绕着这个操场跑2圈，小明每天早上要跑多少米？
<gadget id="calculator">100 + 60</gadget>
<output>160</output>

<gadget id="calculator">160 * 2</gadget>
<output>320</output>

<gadget id="calculator">320 * 2</gadget>
<output>640</output>

<result>640</result>