A train (3/5) travels 45 kilometers in an hour. According to this calculation, it takes 4 hours to travel from city A to city B. How long is the railway between A and B?
一列火车(3/5)小时行了45千米，照这样计算，从甲城到乙城用了4小时．甲、乙两城之间的铁路长多少千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">45 / (3/5)</gadget>
<output>75</output>

<gadget id="calculator">75 * 4</gadget>
<output>300</output>

<result>300</result>