If a cylinder with a base area of 30 square centimeters and a height of 5 decimeters is cut into two sections, how much square decimeters will the area increase?
把一个底面积为30平方厘米，高5分米的圆柱切成2段，面积增加了多少平方分米．
<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<result>60</result>