A car travels 80 kilometers per hour. And the speed of a truck is slower than that of a car (1/4), how many kilometers does the truck travel per hour?
一辆小汽车每小时行驶80千米．而一辆货车的速度比小汽车速度慢(1/4)，货车的每小时行多少千米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<result>60</result>