Cut a cylinder with a base circumference of 18.84 cm and a height of 10 cm into several equal parts and assemble it into an approximate cuboid. What is the surface area of this cuboid in square centimetres.
把底面周长18.84厘米、高10厘米的圆柱切成若干等分，拼成一个近似的长方体．这个长方体的表面积是多少平方厘米．
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</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">18.84 * 10</gadget>
<output>188.4</output>

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

<gadget id="calculator">56.52 + 188.4 + 60</gadget>
<output>304.92</output>

<result>304.92</result>