The perimeter of a base is 18.84 decimeters. A conical metal part with a height of 15 decimeters is melted and forged into a cylinder with the same base. What is the surface area of this cylinder in square decimeters?
把一个底面周长18.84分米．高15分米的圆锥形金属零件，熔化后煅造成一个和它等底的圆柱体，这个圆柱体的表面积是多少平方分米？
<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">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 15</gadget>
<output>141.3</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">141.3 / 28.26</gadget>
<output>5</output>

<gadget id="calculator">18.84 * 5</gadget>
<output>94.2</output>

<gadget id="calculator">56.52 + 94.2</gadget>
<output>150.72</output>

<result>150.72</result>