If it takes 10 hours for a truck to travel from station A to station B, and 8 hours for a passenger car, then the speed of the truck is much slower than that of the passenger car.
从甲站到乙站，货车要行10小时，客车要行8小时，则货车的速度比客车的速度慢多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/8) - (1/10)</gadget>
<output>1/40 = around 0.025</output>

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

<result>1/5 = around 0.2</result>