If a cube with side length 4 decimeters is cut into the largest cylinder, what is the volume in cubic decimeters?
一个棱长4分米的正方体木块削成一个最大的圆柱体，体积是多少立方分米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 4</gadget>
<output>50.24</output>

<result>50.24</result>