cylindrical bucket can hold 18dm**3 of water just enough to fill it up. If a conical solid lead block with the same height as the bottom of the bucket is completely immersed in the water, how many liters of water will there be in the bucket at this time?
一个圆柱形的水桶装18dm**3的水正好能盛满，如果把一块与水桶等底等高的圆锥形实心铅块完全浸入水中，这时桶内还有水多少升．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">18 * (2/3)</gadget>
<output>12</output>

<result>12</result>