car drives from A to B. If the speed is increased by 20%, it can arrive 1 hour earlier than the original time. Arrive 40 minutes earlier, if the speed is 45 kilometers per hour, how many hours will you arrive?
一辆小轿车从甲地开往乙地，如果把车速提高20%，可以比原定时间提前1小时到达，如果以原来的速度行驶了200千米后，再将车速提高25%，则可提前40分钟到达，那么若车速是每小时45千米，几小时到达？
<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">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">25 / 100</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">1 / (5/4)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(2/3) / (1/5)</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">6 - (10/3)</gadget>
<output>8/3 = around 2.666667</output>

<gadget id="calculator">200 / (8/3)</gadget>
<output>75</output>

<gadget id="calculator">1 / (1/6) / 45</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">75 * (2/15)</gadget>
<output>10</output>

<result>10</result>