The volume of a cone is 18 cubic decimeters, the height is 6 decimeters, what is the area of the base?
一个圆锥的体积是18立方分米，高是6分米，底面积是多少．
<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">18 * (1/2)</gadget>
<output>9</output>

<result>9</result>