Two motorboats A and B are sailing towards each other from ports A and B at the same time. When they meet, the ratio of the distance traveled by the two boats A and B is 5:7. After meeting, boat A continued to travel at the original speed of 33.6 kilometers per hour, and it took another 6 hours to reach port B. Find the time when boats A and B met.
甲、乙两艘汽艇同时从A、B两港相向而行，相遇时甲、乙两艇所行路程之比是5：7．相遇后，甲艇继续以原来每小时33.6千米的速度行驶，又用了6小时到达B港，求甲、乙两艇的相遇时间．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">6 * (5/7)</gadget>
<output>30/7 = around 4.285714</output>

<result>30/7 = around 4.285714</result>