The diameter of the bottom surface of the cylindrical oil barrel is 6 decimeters, and the height is 12 decimeters. The volume of kerosene contained in it accounts for (3/4) of the volume of the barrel. How many liters of kerosene are there in the barrel?
圆柱形油桶底面直径6分米，高12分米，内装煤油的体积占桶的容积的(3/4)，桶内有煤油多少升？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3.14 * 9 * 12 * (3/4)</gadget>
<output>254.34</output>

<result>254.34</result>