On the road, a truck is driving at 36 km/h. At 12 km behind the truck, a car is catching up at 60 km/h. The car catches up with the truck a few hours later on the way ?
公路上，一辆卡车正以36千米/时的速度行驶，在卡车后方12千米的地方，一辆轿车正以60千米/时的速度赶上来，轿车几小时后在途中追上卡车？
<gadget id="calculator">60 - 36</gadget>
<output>24</output>

<gadget id="calculator">12 / 24</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>