Xiao Ming goes from downhill to uphill, and then returns by the same route. The ratio of the uphill time to the downhill time is 5:2, so how many times the downhill speed is the uphill speed.
小明从山下到山上，再按原路返回，上山的时间与下山的时间比是5：2，那么下山速度是上山速度的多少倍．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

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