If a car travels from A to B in 5 hours, but actually takes 4 hours, the actual time is much less than the planned time.
一辆汽车从甲地到乙地计划用5小时到达，实际用4小时到达，实际时间比计划时间少用了多少．
<gadget id="calculator">5 - 4</gadget>
<output>1</output>

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

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