The length of the school playground is 70 meters and the width is 35 meters. Liangliang ran 2 laps around the playground, how many meters did he run?
学校操场的长是70米，宽是35米．亮亮绕着操场跑了2圈，他跑了多少米？
<gadget id="calculator">70 + 35</gadget>
<output>105</output>

<gadget id="calculator">105 * 2 * 2</gadget>
<output>420</output>

<result>420</result>