cylinder has a base diameter of 8m and a height of 1m, what is its volume in m**3.
一个圆柱的底面直径是8m，高是1m，它的体积是多少m**3．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 1</gadget>
<output>50.24</output>

<result>50.24</result>