A cylindrical tin oil barrel is filled with half a barrel of oil. After pouring out 40% of the oil in the barrel, there are still 24 liters left. The bottom area of the oil barrel is 16 square decimeters. How many decimeters is its height?
一个圆柱形铁皮油桶内装了半桶油，把桶里的油倒出40%后，还剩24升，油桶的底面积是16平方分米，它的高是多少分米？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">24 / (3/5) / (1/2) / 16</gadget>
<output>5</output>

<result>5</result>