The volume of a cone is 12 cubic decimeters, the height is 4 decimeters, what is the area of the base in square decimeters?
一个圆锥的体积是12立方分米，高是4分米，底面积是多少平方分米．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<result>9</result>