A train travels from point A to point B, and has traveled the entire distance (3/5), which is exactly 120 kilometers. How long is the railway between AB and AB?
一列火车从A地开往B地，已经行了全程的(3/5)，正好行了120千米．AB两地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">120 / (3/5)</gadget>
<output>200</output>

<result>200</result>