Xiao Ming goes to school by bicycle at a speed of 15 km/h, and it takes 0.25 hours from home to school. One day, Xiao Ming's bicycle breaks down, and he walks from home to school at a speed of 5 km/h, how much time does it take?
小明以15千米/时的速度骑自行车上学，从家到学校需0.25小时，一天，小明的自行车坏了，他以5千米/时的速度从家里步行到学校，需要多少时间？
<gadget id="calculator">0.25 / 5</gadget>
<output>0.05</output>

<gadget id="calculator">15 * 0.05</gadget>
<output>0.75</output>

<result>0.75</result>