Xiaoqiang walked 4.5 kilometers per hour from the school to the Children's Palace and arrived in 0.6 hours. How many hours will it take to travel 1.5 kilometers less per hour?
小强从学校到少年宫每小时走4.5千米，0.6小时到达．如果每小时少走1.5千米，需多少小时到达？
<gadget id="calculator">4.5 - 1.5</gadget>
<output>3</output>

<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>