A cylindrical paint bucket is 9 decimeters high, and the diameter of the bottom surface is the height (2/3). How many square decimeters of iron sheet are needed to make this paint bucket?
一个圆柱形油漆桶，高9分米，底面直径是高的(2/3)，做这个油漆桶至少需要铁皮多少平方分米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) / 2</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 * (1/3)</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">9 * (2/3)</gadget>
<output>6</output>

<gadget id="calculator">3.14 * 6 * 9</gadget>
<output>169.56</output>

<gadget id="calculator">28.26 + 169.56</gadget>
<output>197.82</output>

<result>197.82</result>