train travels from station A to station B. After traveling 20% of the whole journey, it travels for another hour. At this time, the ratio of the distance traveled to the remaining distance is 3:2. How many hours will it take for the train to complete the journey? ．
一列火车从甲站开往乙站，行了全程的20%后又行了1小时，这时已行的路程和剩下的路程的比是3：2，这列火车行完全程要多少小时．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/5) - (1/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / (2/5)</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>