If a conical metal part with a base diameter of 6 decimeters and a height of 15 decimeters is melted and cast into a cylinder with the same base as it, what is the surface area of the cylinder in square decimeters?
把一个底面直径6分米，高15分米的圆锥形金属零件熔铸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">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">141.3 / 3.14 / 9</gadget>
<output>5</output>

<gadget id="calculator">3.14 * 6 * 5</gadget>
<output>94.2</output>

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

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

<result>150.72</result>