It takes half an hour for a car to go from point A to point B, how much of the whole journey can be done in 13 minutes
一辆汽车从甲地到乙地用半小时，13分钟可行全程的多少
<gadget id="calculator">13 / 30</gadget>
<output>13/30 = around 0.433333</output>

<result>13/30 = around 0.433333</result>