Use a plastic plate to make a cylindrical rice bucket without a lid. The diameter of the bottom surface of the bucket is 6 decimeters, and the height is 8 decimeters. How many square meters of plastic board is needed to make this bucket at least?
用塑料板制作一个无盖的圆柱米桶，桶的底面直径是6分米，高是8分米．做这个桶至少需用塑料板多少平方米？
<gadget id="calculator">3.14 * 6 * 8</gadget>
<output>150.72</output>

<gadget id="calculator">6 / 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>

<gadget id="calculator">178.98 / 100</gadget>
<output>1.7898</output>

<result>1.7898</result>