A cylinder has a base radius of 3 cm and a height of 5 cm. What is the lateral area of this cylinder in cm**2.
一个圆柱体，它的底面半径是3cm，高是5cm．这个圆柱体的侧面积是多少cm**2．
<gadget id="calculator">3.14 * 2 * 2 * 5</gadget>
<output>62.8</output>

<result>62.8</result>