A cylinder of paper has a diameter of 30 cm at the base and a square when its sides are expanded. What is the volume of the cylinder in cubic centimeters?
一个圆柱形纸筒，它的底面直径是30厘米，侧面展开是一个正方形，这个圆柱的体积是多少立方厘米？
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">15 ** 2</gadget>
<output>225</output>

<gadget id="calculator">3.14 * 30</gadget>
<output>94.2</output>

<gadget id="calculator">3.14 * 225 * 94.2</gadget>
<output>66_552.3</output>

<result>66_552.3</result>