Two cars, A and B, drive from places A and B at the same time and drive opposite each other. When car A travels the whole distance (5/8) and B travels the whole distance (7/12), the distance between the two cars is 15,000 rice. How many kilometers are there between A and B?
甲、乙两辆汽车同时从A、B两地开出，相对而行，当甲车行了全程的(5/8)，乙行了全程的(7/12)时，两车相距15千米．A、B两地相距多少千米？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">(7/12) - 1</gadget>
<output>-5/12 = around -0.416667</output>

<gadget id="calculator">(5/8) + (-5/12)</gadget>
<output>5/24 = around 0.208333</output>

<gadget id="calculator">15 / (5/24)</gadget>
<output>72</output>

<result>72</result>