A passenger car drives from city A to city B, driving 60 kilometers per hour, after driving the whole journey (3/17), a car drives from city B to city A, driving 80 kilometers per hour, the car leaves 4 hours later and meet the bus. How many miles is the distance between A and B?
一辆客车从甲城开往乙城，每小时行驶60千米，行驶了全程的(3/17)后，一辆轿车从乙城开往甲城，每小时行驶80千米，轿车开出4小时后与客车相遇．甲、乙两城之间相距多少千米？
<gadget id="calculator">80 * 4</gadget>
<output>320</output>

<gadget id="calculator">3 / 17</gadget>
<output>3/17 = around 0.176471</output>

<gadget id="calculator">1 - (3/17)</gadget>
<output>14/17 = around 0.823529</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

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

<gadget id="calculator">(14/17) * (4/7)</gadget>
<output>8/17 = around 0.470588</output>

<gadget id="calculator">320 / (8/17)</gadget>
<output>680</output>

<result>680</result>