Cut a cylinder with a base diameter of 6 cm and a height of 10 cm into several equal parts, and assemble them into an approximate cuboid. Does the surface area of the cuboid increase or decrease compared with the surface area of the cylinder? How much is the difference?
把底面直径6厘米，高10厘米的圆柱切成若干等份，拼成一个近似长方体，长方体的表面积与圆柱体的表面积相比是增加了还是减少了？相差多少？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 10 * 2</gadget>
<output>60</output>

<result>60</result>