Cars A and B are traveling towards each other from places A and B at the same time, with a speed ratio of 4:3. Car A traveled the entire distance (3/7) and then traveled another 80 kilometers, just in time to meet Car B. How many kilometers are there between A and B?
甲乙两车分别从A、B两地同时相向而行，速度比是4：3．甲车行了全程的(3/7)后又行了80千米，正好与乙车相遇．A、B两地相距多少千米？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(4/7) - (3/7)</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">80 / (1/7)</gadget>
<output>560</output>

<result>560</result>