If the height and base radius of a cylinder are both 10 decimeters, what is its lateral area in square decimeters?
一个圆柱的高和底面半径都是10分米，它的侧面积是多少平方分米．
<gadget id="calculator">3.14 * 10 * 2 * 10</gadget>
<output>628</output>

<result>628</result>