If a cube has a volume of 4 cubic centimeters and it is cut into the largest cylinder, what is the volume of this cylinder in cubic centimeters?
一个正方体，它的体积是4立方厘米，把它削成一个最大的圆柱体，这个圆柱体的体积是多少立方厘米．
<gadget id="calculator">0.785 * 4</gadget>
<output>3.14</output>

<result>3.14</result>