The distance between A and B is 800 kilometers. A car plans to travel from A to B in 8 hours. After driving for 1 hour, the speed increases by 40% due to the emergency. How many hours will it take to arrive?
甲乙两地相距800千米，一辆汽车计划8小时由甲地到达乙地，汽车开出1小时后，由于情况紧急，速度提高40%，还要几小时才能到达？
<gadget id="calculator">800 / 8</gadget>
<output>100</output>

<gadget id="calculator">800 - 100</gadget>
<output>700</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">100 * (7/5)</gadget>
<output>140</output>

<gadget id="calculator">700 / 140</gadget>
<output>5</output>

<result>5</result>