If a cylindrical steel bar with a length of 15 decimeters and a base area of 8 square centimeters is cut into 2 sections on average, how many centimeters does its surface area increase**2.
把一根长15分米，底面积是8平方厘米的圆柱形钢条平均截成2段，它的表面积增加了多少厘米**2．
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>