cylindrical plastic barrel has a bottom diameter of 2 decimeters and a height of 4 decimeters. After placing a conical iron block of the same height as the bottom and filling it with water, what is the volume of the water? Decimeter.
一个圆柱体塑料桶的底面直径是2分米，高是4分米，在里面放一个和它等底等高的圆锥形铁块后，再向里面倒满水，水的体积是多少π立方分米．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 * 4 * (2/3)</gadget>
<output>8/3 = around 2.666667</output>

<result>8/3 = around 2.666667</result>