train travels 50 kilometers per hour from city A to city B, and it takes 4.8 hours to arrive. If the speed is increased (1/5), how many hours earlier can it arrive?
一列火车从甲城开往乙城，每小时行50千米，4.8小时可以到达，如果速度提高(1/5)，那么可以提前几小时到达？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">50 * (6/5)</gadget>
<output>60</output>

<gadget id="calculator">4.8 / 60</gadget>
<output>0.08</output>

<gadget id="calculator">50 * 0.08</gadget>
<output>4</output>

<gadget id="calculator">4.8 - 4</gadget>
<output>0.8</output>

<result>0.8</result>