cylindrical tin oil barrel is filled with half a barrel of gasoline. After pouring out (3/5) of the gasoline, there are 25.12 liters left. The bottom area of the oil barrel is 12.56 square decimeters, what is the height of the oil barrel?
一只圆柱形铁皮油桶，装了半桶汽油，将汽油的(3/5)倒出后，还剩25.12升．油桶的底面积是12.56平方分米，油桶的高是多少？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/2) * (3/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(1/2) - (3/10)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25.12 / (1/5)</gadget>
<output>125.6</output>

<gadget id="calculator">125.6 / 12.56</gadget>
<output>10</output>

<result>10</result>