How many square decimeters of iron sheets are needed to make 6 cylindrical buckets with a base radius of 2 decimeters and a height of 5 decimeters without a cover?
做6只底面半径是2分米，高是5分米无盖的圆柱形水桶，需要多少平方分米的铁皮？
<gadget id="calculator">2 * 3.14 * 2 * 5</gadget>
<output>62.8</output>

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

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">62.8 + 12.56</gadget>
<output>75.36</output>

<gadget id="calculator">75.36 * 6</gadget>
<output>452.16</output>

<result>452.16</result>