A rectangle has a length of 6 cm and a width of 2 cm. What is the volume of the cylinder obtained by rotating it once about its length in cubic centimeters
一个长方形的长是6厘米，宽是2厘米．以它的长为轴旋转一周所得到的圆柱体的体积是多少立方厘米
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 6</gadget>
<output>75.36</output>

<result>75.36</result>