A train departs from Wuhu to Beijing at a speed of 140 km/h and arrives in 8 hours. How much distance did Zhang Hua drive in one round trip during the summer vacation?
一列火车从芜湖开往北京，行驶速度为140千米/小时，8小时到达．张华暑假往返一次共行驶了多少路程？
<gadget id="calculator">140 * 8 * 2</gadget>
<output>2_240</output>

<result>2_240</result>