A train travels 90 kilometers in (3/4) hours. According to this calculation, it takes (9/2) hours to travel from A to B. How many kilometers is the length of the railway between A and B?
一列火车(3/4)小时行90千米，照这样计算，从甲地到乙地要行(9/2)小时，甲、乙两地铁路长多少千米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">90 / (3/4)</gadget>
<output>120</output>

<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">120 * (9/2)</gadget>
<output>540</output>

<result>540</result>