A car drives for 3 hours in the morning and 2.5 hours in the afternoon, with an average of 38.5 kilometers per hour. How much more kilometers does the car drive in the morning than in the afternoon?
一辆汽车上午行驶了3小时，下午行驶了2.5小时，平均每小时行驶38.5千米，这辆汽车上午比下午多行驶多少千米？
<gadget id="calculator">3 - 2.5</gadget>
<output>0.5</output>

<gadget id="calculator">38.5 * 0.5</gadget>
<output>19.25</output>

<result>19.25</result>