cylindrical oil barrel has a bottom diameter of 4 decimeters and a height of 25 decimeters. If diesel oil weighs 0.85 kilograms per cubic decimeter, how many kilograms of diesel oil can be contained in this oil barrel?
一个圆柱形油桶，底面内直径为4分米，高25分米，如果每立方分米柴油重0.85千克，这个油桶可装柴油多少千克？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 25</gadget>
<output>314</output>

<gadget id="calculator">314 * 0.85</gadget>
<output>266.9</output>

<result>266.9</result>