There is a bucket with a bottom radius of 3 decimeters. The bucket is filled with water and immersed in a cuboid iron block whose bottom is 2 decimeters long. When the iron block is taken out of the water, the water level in the bucket drops by 5 cm, what is the height of this cuboid iron block?
有一个底面半径是3分米的水桶，桶内装满水，并浸有一块底面为边长2分米的长方体铁块，当铁块从水中取出来的时候，桶内的水面下降了5厘米，这块长方体铁块的高是多少？
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 0.5</gadget>
<output>14.13</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">14.13 / 4</gadget>
<output>3.5325</output>

<result>3.5325</result>