Two people, A and B, set off in the same direction at the same time. A rides 15 kilometers per hour, and B rides 10 kilometers per hour. A rides 25 kilometers and returns immediately. How long does it take for A to meet B after starting?
甲乙二人同时同地同向出发，甲每小时骑行15千米，乙每小时骑行10千米，甲骑行25千米后马上返回，甲出发后多少时间与乙相遇？
<gadget id="calculator">15 + 10</gadget>
<output>25</output>

<gadget id="calculator">2 / 25</gadget>
<output>2/25 = around 0.08</output>

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

<result>2</result>