conical funnel with a bottom diameter of 2 decimeters and a height of 3 decimeters can hold the maximum amount of water in milliliters.
一个圆锥形漏斗，底面直径是2分米，高是3分米，它最多可装水多少毫升．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">(1/3) * 3.14 * 1 * 3 * 1_000</gadget>
<output>3_140</output>

<result>3_140</result>