A cylindrical oil barrel is filled with half a barrel of gasoline, 40% of the gasoline in the barrel is poured out, and there are still 24 liters of gasoline in the barrel. Given that the height of the oil barrel is 0.8 meters, find the area of the bottom of the oil barrel.
一个圆柱形油桶，装了半桶汽油，把桶里的汽油倒出40%，桶内还有汽油24升．已知油桶的高是0.8米，求油桶的底面积．
<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">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">0.8 * 10</gadget>
<output>8</output>

<gadget id="calculator">24 / (3/5) / (1/2) / 8</gadget>
<output>10</output>

<result>10</result>