If the sum of the volumes of a cylinder and a cone with the same base and height is 12 cubic decimeters, what is the volume of the cylinder in cubic decimeters?
等底等高的圆柱和圆锥体积之和是12立方分米，圆柱的体积是多少立方分米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">12 / (4/3)</gadget>
<output>9</output>

<result>9</result>