There are two cylinders, A and B, with the same base area. The height of cylinder A is 3.14 cm, and the side surface is a square; the height of cylinder B is 4 cm. What is its volume in cubic centimeters?
有甲乙两个底面积相等的圆柱体，甲圆柱体高3.14厘米，侧面展开是正方形；乙圆柱体高4厘米，它的体积是多少立方厘米．
<gadget id="calculator">3.14 / 3.14 / 2</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 ** 2</gadget>
<output>0.25</output>

<gadget id="calculator">3.14 * 0.25 * 4</gadget>
<output>3.14</output>

<result>3.14</result>