A passenger train travels from A to B, and travels 30 kilometers in (3/5) hours, which is equivalent to (5/18) the distance between A and B. How many kilometers are there between the two cities?
一列客车从甲地开往乙地，经调查(3/5)小时行驶30千米，相当于甲乙两城距离的(5/18)．甲乙两城相距多少千米？
<gadget id="calculator">5 / 18</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">30 / (5/18)</gadget>
<output>108</output>

<result>108</result>