In a 25-meter-long swimming pool, A swims 6 meters per minute, and B swims 4 meters per minute. At the same time, starting from the starting point, how many minutes does it take for A to swim to the opposite bank and meet B when he returns.
在25米长的游泳池里，甲每分钟游6米，乙每分钟游4米，同时从起点出发，需经过多少分钟甲游到对岸再返游时与乙相遇．
<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 * (1/5)</gadget>
<output>5</output>

<result>5</result>