Two ships, A and B, set off from two ports at the same time. When they met, A and B traveled the entire distance (3/7). It is known that B’s speed is 25 kilometers per hour, and A’s journey takes 16 hours. The distance between the two ports is How many kilometers?
甲乙两船同时从两个港口相对开出，相遇时甲船行了全程的(3/7)，已知乙的速度是每小时25千米，甲行全程要16小时，两港间的航程是多少千米？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(3/7) / (4/7)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">25 * (3/4) * 16</gadget>
<output>300</output>

<result>300</result>