A cylindrical tin bucket without a cover has a bottom radius of 6cm and a height of 8cm. What is the minimum amount of tin needed to make this bucket**2.
一个无盖的圆柱形铁皮水桶，底面半径是6cm，高是8cm，做这个水桶至少需铁皮多少cm**2．
<gadget id="calculator">3.14 * 2 * 6 * 8</gadget>
<output>301.44</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<gadget id="calculator">301.44 + 113.04</gadget>
<output>414.48</output>

<result>414.48</result>