Make an uncovered cylindrical tin bucket with a bottom diameter of 4dm and a height of 6dm. About how many square decimeters of iron sheet are used to make this bucket?
做一个无盖的圆柱铁皮水桶，底面直径4dm，高6dm．做这个水桶要用铁皮约多少平方分米？
<gadget id="calculator">3.14 * 4 * 6</gadget>
<output>75.36</output>

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

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

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

<gadget id="calculator">75.36 + 12.56</gadget>
<output>87.92</output>

<result>87.92</result>