If the volume of a cylinder is 12 cubic meters, what is the total volume of three cones with the same base and height in cubic meters?
一个圆柱的体积是12立方米，与它的等底等高的3个圆锥的体积共是多少立方米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 * (1/3) * 3</gadget>
<output>12</output>

<result>12</result>