In a cylindrical bucket, put a conical iron block with a base radius of 3 cm (submerged in water), and the water level in the bucket rises by 0.5 cm. It is known that the bottom radius of a cylindrical bucket is 6 cm and the height is 18 cm. What is the height of the cone of iron?
在一个圆柱形水桶中，放入一个底面半径是3厘米的圆锥体铁块(浸没在水中)，水桶中的水面上升了0.5厘米．已知圆柱形水桶的底面半径是6厘米，高是18厘米．这个圆锥体铁块的高是多少？
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36 * 0.5</gadget>
<output>56.52</output>

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

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

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

<gadget id="calculator">56.52 / (1/3) / 28.26</gadget>
<output>6</output>

<result>6</result>