cylindrical tin oil barrel contains half a barrel of gasoline. After pouring out 50% of the total amount, there is still 12L of gasoline left. If the inner bottom surface area of this oil barrel is 2dm**2, what is the height of the oil barrel?
一个圆柱形铁皮油桶内装有半桶汽油，现在倒出总量的50%后，还剩12L汽油，如果这个油桶的内底面面积是2dm**2，油桶的高是多少？
<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">12 / (1/2)</gadget>
<output>24</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">24 * 1</gadget>
<output>24</output>

<result>24</result>