Xiaofang has two roads of the same length from home to school, one is flat, the other is half uphill and half downhill. It takes Xiaofang the same amount of time to go to school on these two roads. It is known that the speed of going downhill is 1.6 times that of a flat road, so how many times is the speed of going uphill than a flat road?
小芳从家到学校有两条一样长的路，一条是平路，另一条是一半上坡路，一半下坡路．小芳上学走这两条路所用的时间一样多．已知下坡的速度是平路的1.6倍，那么上坡的速度是平路的多少倍．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 1.6</gadget>
<output>0.3125</output>

<gadget id="calculator">1 - 0.3125</gadget>
<output>0.6875</output>

<gadget id="calculator">(1/2) / 0.6875 / 1</gadget>
<output>0.727273</output>

<result>0.727273</result>