If the radius of the bottom of a cylindrical beverage can is 2 cm and the height is 4 times the radius, what is the volume of the beverage can in cubic centimeters?
量得一个圆柱体饮料罐底面半径是2厘米，高是半径的4倍，这个饮料罐体积是多少立方厘米．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">3.14 * 4 * 8</gadget>
<output>100.48</output>

<result>100.48</result>