A cylindrical bucket has an internal diameter of 4 decimeters and a depth of 5 decimeters. Now pour 4.71 liters of water into the bucket, how much water occupies the volume of the bucket
一个圆柱形水桶，桶内部直径为4分米，桶深5分米．现将4.71升水倒进桶里，水占水桶容积的多少
<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">4.71 / 62.8</gadget>
<output>0.075</output>

<result>0.075</result>