The distance between A and B is 200 kilometers. It takes 5 hours to travel by car and 40 hours to walk. Liu Qiang starts from A, walks for 8 hours and then takes a car. How many hours will it take to reach B?
甲、乙两地相距200千米，行完全程乘汽车要5小时，步行要40小时，刘强从甲地出发，先步行8小时后改乘汽车，还需要几小时才能到达乙地？
<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">(1/40) * 8</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<result>4</result>