A cylinder has a radius of 3.2dm and a height of 5dm. What is the lateral area of this cylinder.
一个圆柱的半径是3.2dm，高5dm．这个圆柱的侧面积是多少．
<gadget id="calculator">3.14 * 3.2 * 2 * 5</gadget>
<output>100.48</output>

<result>100.48</result>