There is a cuboid iron block whose length is 9dm, width is 5dm, and height is 3.14dm. It is melted into a cylindrical iron block. The radius of the bottom surface of this cylindrical iron block is 3dm. How many decimeters is the height?
有一个长方体铁块的长是9dm，宽是5dm，高是3.14dm，把它熔制成一个圆柱形铁块，这个圆柱形铁块的底面半径是3dm，高是多少分米？
<gadget id="calculator">9 * 5 * 3.14</gadget>
<output>141.3</output>

<gadget id="calculator">3.14 * 3 * 3</gadget>
<output>28.26</output>

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

<result>5</result>