If a car travels 800 km in 10 hours, how many hours will it take to drive 200 km at the same speed?
一辆汽车10小时行800km，用同样的速度行驶了200km，需要多少小时？
<gadget id="calculator">800 / 10</gadget>
<output>80</output>

<gadget id="calculator">200 / 80</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>