A small boat takes 2 hours to go back and forth from port A to port B. When it comes back, it travels 8 kilometers per hour more than when it went. Therefore, it travels 6 kilometers more in the second hour than in the first hour. What is the distance between ports A and B?
一只小船从A港到B港往返一次共用2小时，回来时顺水，比去时每小时多行驶8千米，因此第2小时比第1小时多行驶了6千米．A、B两港的距离是多少米．
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/3) - (4/5)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">8 / (8/15)</gadget>
<output>15</output>

<result>15</result>