The two ports of A and B are 240 kilometers apart. A passenger ship and a cargo ship departed from the two ports at 9:00 am on May 4 and headed for the other port. The passenger ship travels 36 kilometers per hour, and the cargo ship travels 24 kilometers per hour. When the two ships arrive at each other's port, how many minutes before the passenger ship arrives at the cargo ship?
甲乙两港相距240千米，一艘客船和一艘货船于5月4日上午9：00分别从两港相向开出，驶向对方港口．客船每小时行36千米，货船每小时行24千米，两艘轮船到达对方港口时，客船比货船早到多少分钟？
<gadget id="calculator">240 / 24</gadget>
<output>10</output>

<gadget id="calculator">240 / 36</gadget>
<output>20/3 = around 6.666667</output>

<gadget id="calculator">10 - (20/3)</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">(10/3) * 60</gadget>
<output>200</output>

<result>200</result>