The total distance of alpine skiing is 4.5 kilometers. Xiao Ming can ski 3.2 kilometers per hour. He has been skating for 1.25 hours. How many kilometers is Xiao Ming away from the finish line?
高山滑雪的总路程是4.5千米，小明每小时能滑3.2千米，已经滑了1.25小时，小明离终点还有多少千米？
<gadget id="calculator">3.2 * 1.25</gadget>
<output>4</output>

<gadget id="calculator">4.5 - 4</gadget>
<output>0.5</output>

<result>0.5</result>