A cylindrical milk powder box has a base radius of 4 cm and a height of 20 cm. What is its volume in cubic centimeters?
一个圆柱形奶粉盒的底面半径是4厘米，高是20厘米，它的容积是多少立方厘米？
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 20</gadget>
<output>1_004.8</output>

<result>1_004.8</result>