Two people, A and B, start from A and B, which are 9 kilometers apart, at the same time, and cycle back and forth between A and B continuously. It is known that A is riding a bicycle at a speed of 25 kilometers per hour, and B is riding a bicycle at a speed of 10 kilometers per hour. When A catches up with B for the third time, how many kilometers away from A is the place where he catches up.
甲、乙两人分别从相距9千米的A、B两地同时出发，在A、B之间不断往返骑车．已知甲骑车的速度是每小时25千米，乙骑车的速度是每小时10千米．甲第三次追上乙，追及的地点距离A多少千米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 * (1/3)</gadget>
<output>3</output>

<result>3</result>