A cylindrical tea canister with a lid with a bottom diameter of 10 cm and a height of 25 cm is to be covered with a layer of colored paper all over the body. How many square centimeters of colored paper is needed at least?
一个底面直径10厘米、高25厘米的有盖子圆柱形茶筒，要给它全身包装上一层彩纸，至少要多少平方厘米的彩纸？
<gadget id="calculator">3.14 * 10 * 25</gadget>
<output>785</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">785 + 157</gadget>
<output>942</output>

<result>942</result>