Take a bus from Pingshan to Longgang, the average speed of the bus is 30.5 km/h, and it will arrive in 0.4 hours. How many kilometers is Pingshan from Longgang?
从坪山乘公共汽车去龙岗，公共汽车的平均速度是30.5千米/小时，0.4小时后达到．坪山距龙岗多少千米？
<gadget id="calculator">30.5 * 0.4</gadget>
<output>12.2</output>

<result>12.2</result>