Make a cylindrical iron bucket without a cover, each with a height of 3 decimeters and a bottom diameter of 2 decimeters. When feeding, consider the joints and scraps to increase the material by 30%. How many square meters of iron sheets are needed to make 50 such buckets?
做一种没有盖的圆柱形铁皮水桶，每个高3分米，底面直径2分米，投料时考虑到接头处和边角料要增加30%的用料．做50个这样的水桶需多少平方米铁皮？
<gadget id="calculator">3.14 * 2 * 3</gadget>
<output>18.84</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">18.84 + 3.14</gadget>
<output>21.98</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">21.98 * (3/2) * (1/2)</gadget>
<output>16.485</output>

<result>16.485</result>