The 318 bus line has a total length of 25 kilometers, and a bus has to drive 8 round trips every day. How many kilometers do these two cars drive every day?
318路公交线路全长25千米，一辆公交车每天要开8个来回．这两车每天行驶多少千米？
<gadget id="calculator">25 * 8 * 2</gadget>
<output>400</output>

<result>400</result>