Li Ming walks 4.5 kilometers per hour from school to the Children's Palace, and can reach it in 0.6 hours. How many hours will it take to travel 3 kilometers per hour?
李明从学校到少年宫，每小时走4.5千米，0.6小时可以到达．如果每小时只走3千米，要多少小时才能到达．
<gadget id="calculator">0.6 / 3</gadget>
<output>0.2</output>

<gadget id="calculator">4.5 * 0.2</gadget>
<output>0.9</output>

<result>0.9</result>