A passenger ship and a cargo ship set off from two wharves A and B at the same time. When the passenger ship travels the whole distance (3/7), the cargo ship travels 36 kilometers. When the passenger ship arrives at B dock, the cargo ship travels the whole distance ( 7/10). How many kilometers are there between the two piers A and B?
一艘客轮和一艘货轮从甲乙两个码头同时相对开出，当客轮行了全程的(3/7)时，货轮行了36千米，当客轮到达乙码头时，货轮行了全程的(7/10)．甲乙两个码头相距多少千米？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

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

<gadget id="calculator">(3/7) * (7/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">36 / (3/10)</gadget>
<output>120</output>

<result>120</result>