To make a cylindrical iron bucket without a cover, the circumference of the bottom surface is 18.84 decimeters, and the height is 8 decimeters. How many square decimeters of iron sheet is needed at least?
做一个圆柱形的无盖铁皮水桶，底面周长18.84分米，高8分米，至少需要多少平方分米的铁皮？
<gadget id="calculator">18.84 * 8</gadget>
<output>150.72</output>

<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">150.72 + 28.26</gadget>
<output>178.98</output>

<result>178.98</result>