As shown in the figure on the right, a cylinder with a height of 10 cm and a radius of 4 cm is cut into several equal parts and assembled into an approximate cuboid. How much square centimeters does the surface area of the assembled cuboid increase compared to the cylinder?
如右图所示，把一个高为10厘米，半径为4厘米的圆柱切成若干等分，拼成一个近似的长方体．拼成的长方体表面积比圆柱增加了多少平方厘米．
<gadget id="calculator">4 * 10 * 2</gadget>
<output>80</output>

<result>80</result>