A cylindrical material with a length of 30dm is divided into four equal cylinders, and the surface area increases by 18.84dm**2. What is the surface area of the original cylindrical wood?
一根圆柱形材料长30dm，分成四个相等的圆柱形，表面积增加了18.84dm**2，原来圆柱体木料的表面积是多少？
<gadget id="calculator">18.84 / 6</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 / 3.14</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 2 * 30</gadget>
<output>188.4</output>

<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<gadget id="calculator">188.4 + 6.28</gadget>
<output>194.68</output>

<result>194.68</result>