If the radius of the base of a cylinder is twice the radius of the base of a cone, and their heights are equal, what is the volume of the cylinder to the volume of the cone?
一个圆柱的底面半径是一个圆锥底面半径的2倍，它们的高相等，则这个圆柱的体积是这个圆锥体积的多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 / (1/3)</gadget>
<output>12</output>

<result>12</result>