It takes Xiaojie 2 hours to walk 8 kilometers. If he walks 15 kilometers at the same speed, how many hours will it take?
小杰步行8千米需要2小时，如果他用同样的速度步行15千米，需要多少小时？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">15 / 4</gadget>
<output>15/4 = around 3.75</output>

<result>15/4 = around 3.75</result>