A cube solid iron block with a side length of 6 cm is cast into a conical solid iron block with a height of 8 cm. What is the bottom area of this conical solid iron block?
把一块棱长6厘米的正方体实心铁块，铸造成一个高8厘米的圆锥实心铁块，这块圆锥实心铁块的底面积是多少？
<gadget id="calculator">6 * 6 * 6</gadget>
<output>216</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">216 * (3/8)</gadget>
<output>81</output>

<result>81</result>