A cylindrical mechanical part has a base diameter of 3 cm and a height of 0.4 cm. If the surface of this part is painted, how many square centimeters is the painted area?
一个圆柱形机械零件，底面直径是3厘米，高是0.4厘米，将这个零件表面涂漆，涂漆的面积是多少平方厘米？
<gadget id="calculator">3.14 * 3 * 0.4</gadget>
<output>3.768</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) ** 2</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">2 * 3.14 * (9/4)</gadget>
<output>14.13</output>

<gadget id="calculator">3.768 + 14.13</gadget>
<output>17.898</output>

<result>17.898</result>