A car is driving to a place B. If the speed of the car is increased by 20%, it can arrive 1 hour earlier than the original time. How many hours will it take to complete the journey now?
一辆汽车开往乙地，如果把车速提高20%，那么可以比原定时间提前1小时到达，现在行完全程要几小时？
<gadget id="calculator">20 / 100</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">1 / (6/5)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / (1/6)</gadget>
<output>6</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<result>5</result>