The volume of a cone is 30cm**3 the height is 6cm, what is the area of the bottom in cm**2.
一个圆锥的体积是30cm**3高是6cm，底面积是多少cm**2．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">30 / (1/3) / 6</gadget>
<output>15</output>

<result>15</result>