A cylindrical oil drum has a bottom diameter of 4 decimeters and a height of 5 decimeters. If each liter of diesel oil weighs 0.85 kilograms, how many kilograms of diesel oil can this oil barrel hold? (The thickness of the barrel is ignored)
一个圆柱形油桶，底面直径是4分米，高是5分米，若每升柴油重0.85千克，这个油桶可装柴油多少千克？(油桶的厚度忽略不计)
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 5</gadget>
<output>62.8</output>

<gadget id="calculator">0.85 * 62.8</gadget>
<output>53.38</output>

<result>53.38</result>