If a ship travels from A to B, it takes 8 hours to sail along the current and 12 hours to sail against the current. How long does it take to travel the same distance in a windless lake?
一艘轮船从甲地到乙地，顺水需要航行8小时，逆水需要航行12小时，那么它在无风的湖里行驶同样的距离需要多长时间？
<gadget id="calculator">5 / 48</gadget>
<output>5/48 = around 0.104167</output>

<gadget id="calculator">1 / (5/48)</gadget>
<output>48/5 = around 9.6</output>

<result>48/5 = around 9.6</result>