A cylindrical side is unfolded to form a square with a side length of 12.56 cm. What is the volume of this cylinder in cm**3.
一个圆柱形侧面展开后是一个边长12.56cm的正方形，这圆柱体的体积是多少cm**3．
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 12.56</gadget>
<output>157.7536</output>

<result>157.7536</result>