The speeds of two ships A and B in still water are respectively 36 kilometers per hour and 28 kilometers per hour. Today, the two ports are facing each other at the same time from the two ports that are 192 kilometers apart. Ship A is going upstream and ship B is going down the current. Hours later the two ships meet?
甲、乙两船在静水的速度分别是每小时36千米和每小时28千米，今从相隔192千米的两港同时面对面行驶，甲船逆水而上，乙船顺水而下，那么几小时后两船相遇？
<gadget id="calculator">192 / 64</gadget>
<output>3</output>

<result>3</result>