If a cylinder has a base radius of 10 cm and a height of 10 cm, what is its lateral area in square centimeters?
一个圆柱体的底面半径是10厘米，高10厘米，它的侧面积是多少平方厘米．
<gadget id="calculator">2 * 3.14 * 10 * 10</gadget>
<output>628</output>

<result>628</result>