A cylindrical tin can has a bottom diameter of 10 cm and a height of 6 cm. How many square centimeters of iron sheet is needed to make such a can?
一个圆柱形的罐头盒，底面直径10厘米，高6厘米，做这样一个罐头盒，至少需要多少平方厘米的铁皮？
<gadget id="calculator">3.14 * 10 * 6</gadget>
<output>188.4</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 2</gadget>
<output>157</output>

<gadget id="calculator">188.4 + 157</gadget>
<output>345.4</output>

<result>345.4</result>