cylinder has a base radius of 0.2 meters and a height of 35 decimeters. What is its lateral area?
一个圆柱，底面半径是0.2米，高是35分米，它的侧面积是多少平方分米？
<gadget id="calculator">3.14 * 0.2 * 10 * 0.2 * 10 * 35</gadget>
<output>439.6</output>

<result>439.6</result>