cylinder with a base circumference of 9.42 cm is exactly a square when its sides are expanded. What is the volume of this cylinder?
一个底面周长是9.42cm的圆柱侧展开正好是一个正方形，这个圆柱的体积是多少．
<gadget id="calculator">9.42 / 3.14 / 2</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>