A pair of cylindrical metal buckets without a lid has a bottom circumference of 9.42 decimeters and a height of 8 decimeters. How many square decimeters of iron sheets are needed to make such a pair of buckets?
一对圆柱形无盖铁皮水桶，底面周长9.42分米，高8分米，做这样的一对水桶至少需要铁皮多少平方分米？
<gadget id="calculator">9.42 / 3.14 / 2</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">3.14 * 2.25 * 2</gadget>
<output>14.13</output>

<gadget id="calculator">9.42 * 8</gadget>
<output>75.36</output>

<gadget id="calculator">14.13 + 75.36</gadget>
<output>89.49</output>

<gadget id="calculator">89.49 * 2</gadget>
<output>178.98</output>

<result>178.98</result>