Pour 141.3 liters of water into an uncovered iron sheet cylinder bucket with a bottom circumference of 18.84 decimeters, which can just be filled. Please calculate how many square decimeters of iron sheet is used for this iron sheet bucket?
把141.3升水倒入一个底面周长18.84分米的无盖铁皮圆柱体水桶中，正好能倒满，请你算算这个铁皮水桶用铁皮多少平方分米？
<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">141.3 / 28.26</gadget>
<output>5</output>

<gadget id="calculator">18.84 * 5</gadget>
<output>94.2</output>

<gadget id="calculator">28.26 + 94.2</gadget>
<output>122.46</output>

<result>122.46</result>