What is the lateral area of a cylinder with a base radius of 2 decimeters and a height of 10 decimeters?
一个底面半径是2分米，高10分米的圆柱，它的侧面积是多少平方分米？
<gadget id="calculator">3.14 * 2 * 2 * 10</gadget>
<output>125.6</output>

<result>125.6</result>