What is the lateral area of a cylinder with a base radius of 2 cm and a height of 10 cm?
圆柱体的底面半径2厘米、高10厘米，它的侧面积是多少平方厘米．
<gadget id="calculator">3.14 * 2 * 2 * 10</gadget>
<output>125.6</output>

<result>125.6</result>