A cylindrical bottle cap has a base radius of 1.2 cm and a height of 2 cm. Paste colored paper on the bottom and sides of the bottle cap, at least how many square centimeters of colored paper are needed?
一个圆柱形瓶盖，底面半径是1.2厘米，高是2厘米．在瓶盖的上底和侧面糊上彩纸，至少要多少平方厘米的彩纸？
<gadget id="calculator">1.2 ** 2</gadget>
<output>1.44</output>

<gadget id="calculator">3.14 * 1.44</gadget>
<output>4.5216</output>

<gadget id="calculator">3.14 * 1.2 * 2 * 2</gadget>
<output>15.072</output>

<gadget id="calculator">4.5216 + 15.072</gadget>
<output>19.5936</output>

<result>19.5936</result>