A cylindrical wood with a height of 8 decimeters and a bottom diameter of 4 decimeters is cut into a cuboid with a square bottom and constant height. What is the largest cubic decimeter of the volume of this cuboid?
一根圆柱形木料的高为8分米，底面直径为4分米，把它削成一根底面是正方形、高不变的长方体木料．这个长方体木料的体积最大是多少立方分米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">2 * 1 * 4</gadget>
<output>8</output>

<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>