A ship sails from port A to port B, sailing 25 kilometers per hour, and can reach the destination in 8 hours. From port B back to port A, sailing 20 kilometers per hour, how many hours can it be reached?
一艘轮船，从甲港开往乙港，每小时航行25千米，8小时可以到达目的地．从乙港返回甲港，每小时航行20千米，几小时可以到达？
<gadget id="calculator">8 / 20</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">25 * (2/5)</gadget>
<output>10</output>

<result>10</result>