To chisel a cylindrical stone into the largest cone, how much of the cylinder should be chiseled
把1个圆柱形石料凿成1个最大的圆椎体，要凿掉圆柱体的多少
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>