A right cylindrical granary, the lateral expansion is a square, its base radius is known to be 2 meters, what is the volume of this cylindrical granary in cubic meters?
一个直圆柱体粮仓，侧面展开是一个正方形，已知它的底面半径是2米，求这个圆柱体粮仓的容积是多少立方米？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 2 * 2</gadget>
<output>12.56</output>

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

<result>157.7536</result>