A cylinder and a cone have the same base area. The side view of the cylinder is a square with a side length of 6.28cm. The height of the cone is 12cm, what is its volume in cm**3.
一个圆柱和一个圆锥的底面积相等．圆柱的侧面展开图是正方形，边长是6.28cm．圆锥高12cm，它的体积是多少cm**3．
<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 * 12</gadget>
<output>12.56</output>

<result>12.56</result>