Cut a cylinder with a base diameter of 6 cm and a height of 10 cm into several small sectors and assemble them into an approximate cuboid. What is the surface area of this cuboid?
把一个底面直径6厘米、高10厘米的圆柱切割成若干小扇形，拼成一个近似长方体，这个长方体的表面积是多少？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 2</gadget>
<output>56.52</output>

<gadget id="calculator">3.14 * 6 * 10</gadget>
<output>188.4</output>

<gadget id="calculator">56.52 + 188.4</gadget>
<output>244.92</output>

<gadget id="calculator">60 + 244.92</gadget>
<output>304.92</output>

<result>304.92</result>