A cylindrical oil barrel has a bottom diameter of 6 decimeters and a height of 12 decimeters. If the mass of gasoline per liter is 0.8 kilograms, how many kilograms of gasoline can this person's oil barrel hold?
一个圆柱形油桶，底面内直径是6分米，高是12分米．如果每升汽油的质量是0.8千克，这人油桶共能装汽油多少千克？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">3.14 * 9 * 12 * 0.8</gadget>
<output>271.296</output>

<result>271.296</result>