A cylindrical oil barrel has a diameter of 6 decimeters and a height of 12 decimeters. If 1 liter of gasoline weighs 0.75 kilograms, how many kilograms of oil can this barrel hold at most?
一个圆柱形的油桶内底面直径6分米，高12分米．如果1升汽油0.75千克，这个油桶最多装油多少千克？
<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 * 0.75</gadget>
<output>254.34</output>

<result>254.34</result>