A train travels from A to B. It travels 120 kilometers in the first hour, which is 1/4 longer than in the second hour. The two hours are just 3/4 of the journey. Hours of average speed, how many more hours will it take to arrive?
一列火车从甲地开往乙地，第一小时行驶120千米，比第二小时多行驶(1/4)，这两个小时正好行完全程的(3/4)，如果以后照前两小时的平均速度行驶，还要再行几小时到达？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">120 / (5/4)</gadget>
<output>96</output>

<gadget id="calculator">120 + 96</gadget>
<output>216</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">216 / (3/4)</gadget>
<output>288</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">288 * (1/4)</gadget>
<output>72</output>

<gadget id="calculator">216 / 2</gadget>
<output>108</output>

<gadget id="calculator">72 / 108</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>