A cylinder and a cone have the same base area. The height of the cylinder is 6.28 cm. The side area along the height is a square. The height of the cone is 9 cm. What is the volume of the cone in cubic centimeters?
一个圆柱和一个圆锥的底面积相等，圆柱高6.28厘米，侧面积沿高展开是一个正方形，圆锥高是9厘米，圆锥的体积是多少立方厘米．
<gadget id="calculator">6.28 / 2 / 3.14</gadget>
<output>1</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">(1/3) * 3.14 * 1 * 9</gadget>
<output>9.42</output>

<result>9.42</result>