A cylindrical oil barrel has an inner diameter of 10dm at the bottom and a height of 4dm. If diesel oil weighs 0.85 kg per cubic decimeter, how many kilograms of diesel oil can this oil barrel hold at most?
一个圆柱形油桶，底面内直径10dm，高4dm，如果每立方分米的柴油重0.85千克，这个油桶最多可装柴油多少千克？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

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

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

<result>266.9</result>