The distance between the two piers A and B is 3600 meters. Ferry A travels an average of 185 meters per minute, and ferry B travels an average of 175 meters per minute. These two ferries are running opposite each other from the two piers A and B at the same time. Passengers need to stop at the pier for 4 Minutes, how many minutes after the first encounter?
甲乙两个码头相距3600米，A渡轮平均每分钟行185米，B渡轮平均每分钟行175米，这两艘渡轮同时分别从甲乙两个码头相向而行，靠码头时乘客上船需停4分钟，第一次相遇后，又经过几分钟相遇？
<gadget id="calculator">185 + 175</gadget>
<output>360</output>

<gadget id="calculator">3_600 / 360</gadget>
<output>10</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">4 - 10</gadget>
<output>-6</output>

<gadget id="calculator">30 + (-6)</gadget>
<output>24</output>

<result>24</result>