A cylindrical bucket with a height of 5 decimeters and a bottom radius of 2 decimeters is to be coated with a layer of antirust paint on its surface. What is the area of the paint?
一圆柱形水桶，高5分米，底面半径2分米，现在要在它表面涂一层防锈漆，油漆的面积是多少？
<gadget id="calculator">2 * 3.14 * 2 * 5</gadget>
<output>62.8</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">62.8 + 12.56</gadget>
<output>75.36</output>

<result>75.36</result>