A cylinder with a base radius of 1 decimeter and a height of 6 decimeters is cut into two equal pieces along the diameter of the base. How much does the surface area increase?
一个底面半径是1分米，高6分米的圆柱形木料沿其底面直径切成相等的两块，表面积增加了多少？
<gadget id="calculator">1 * 2 * 6 * 2</gadget>
<output>24</output>

<result>24</result>