A cylindrical steel with a length of 2m and a bottom area of 34.2m**2, what is its volume in m**3.
一根长是2m，底面积是34.2m**2的圆柱形钢材，它的体积是多少m**3．
<gadget id="calculator">34.2 * 2</gadget>
<output>68.4</output>

<result>68.4</result>