car travels 280.24 kilometers in 5 hours, and a motorcycle travels 120.6 kilometers in 3 hours. How many kilometers per hour is the average speed of the motorcycle slower than the car?
一辆小车5小时行了280.24千米，一辆摩托车3小时行了120.6千米，摩托车比小车平均每小时慢多少千米？
<gadget id="calculator">280.24 / 5</gadget>
<output>56.048</output>

<gadget id="calculator">120.6 / 3</gadget>
<output>40.2</output>

<gadget id="calculator">56.048 - 40.2</gadget>
<output>15.848</output>

<result>15.848</result>