A cuboid iron block with a length of 7 cm, a width of 6 cm, and a height of 4.5 cm is melted and cast into a cylinder with a base radius of 4 cm. What is the height of the cylinder in cm?
把一个长7cm，宽6cm，高4.5cm的长方体铁块和一个棱长为5cm的正方体铁块，熔铸成一个底面半径为4cm的圆柱体，这个圆柱体的高是多少厘米？
<gadget id="calculator">7 * 6 * 4.5</gadget>
<output>189</output>

<gadget id="calculator">5 * 5 * 5</gadget>
<output>125</output>

<gadget id="calculator">189 + 125</gadget>
<output>314</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">314 / 50.24</gadget>
<output>6.25</output>

<result>6.25</result>