To make a cylindrical tin bucket without a cover, the radius of the bottom surface is 10 cm, which is high (1/3), how many square centimeters of tin is needed to make this bucket?
做一个无盖的圆柱形铁皮水桶，底面半径10厘米，是高的(1/3)，做这个水桶至少需要铁皮多少平方厘米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">10 / (1/3)</gadget>
<output>30</output>

<gadget id="calculator">2 * 3.14 * 10 * 30</gadget>
<output>1_884</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<gadget id="calculator">1_884 + 314</gadget>
<output>2_198</output>

<result>2_198</result>