Car A and car B leave opposite places at the same time from places A and B. When car A travels the entire distance (5/7), car B travels 72 kilometers; when car A arrives at place B, car B goes The whole process (7/10). How many kilometers are there between A and B?
甲、乙两车同时从A、B两地相对开出，当甲车行了全程的(5/7)时，乙车行了72千米；当甲车到达B地时，乙车行了全程的(7/10)．A、B两地相距多少千米？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(5/7) * (7/10)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">72 / (1/2)</gadget>
<output>144</output>

<result>144</result>