If a car travels from A to B, if it travels 30 kilometers per hour, it can be reached in 5 hours; when returning, it travels 5 kilometers per hour less, how many hours can it be reached?
一辆汽车从甲地到乙地，如果每小时行30千米，5小时可以到达；返回时，每小时少行5千米，几小时可以到达？
<gadget id="calculator">30 - 5</gadget>
<output>25</output>

<gadget id="calculator">5 / 25</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 * (1/5)</gadget>
<output>6</output>

<result>6</result>