The advertising company pastes a square poster on the side of a cylindrical light box with a bottom circumference of 9.42dm, just enough to fill it up. What is the volume of this cylindrical light box in dm**3.
广告公司将一张正方形海报贴在一底面周长为9.42dm的圆柱形灯箱的侧面，刚好贴满，这个圆柱形灯箱的体积是多少dm**3．
<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">9.42 / 6.28</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">3.14 * 2.25 * 9.42</gadget>
<output>66.5523</output>

<result>66.5523</result>