There is a cylinder with a base radius of 4 cm and a height of 6 cm. If it is cut along the line connecting the center of the upper and lower bases, how many square centimeters will its surface area increase?
有一个底面半径是4厘米，高是6厘米的圆柱，沿上、下底面的圆心连线将它切开，它的表面积增加了多少平方厘米．
<gadget id="calculator">4 * 2 * 6 * 2</gadget>
<output>96</output>

<result>96</result>