cylindrical tin oil barrel contains half a barrel of gasoline, and after pouring out (3/5) of the gasoline, there are still 12 liters of gasoline left. If the inner bottom area of this oil barrel is 10 square decimeters, how many decimeters is the height of the oil barrel?
一个圆柱铁皮油桶内装有半捅汽油，现在倒出汽油的(3/5)后，还剩12升汽油．如果这个油桶的内底面积是10平方分米，油桶的高是多少分米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">12 / (2/5)</gadget>
<output>30</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">60 / 10</gadget>
<output>6</output>

<result>6</result>