A conical sand pile has a bottom area of 4 meters in diameter and a height of 2.5 meters. If the sand is placed in a rectangular sand pool, the height of the sand is equivalent to (2/3) the depth of the pool. What is the volume of the rectangular sand pool in cubic meters ?
一个圆锥形沙堆，底面积直径4米，高2.5米，如果这些沙子放入一个长方形沙池内，沙子的高度相当于池深的(2/3)，这个长方形沙池的容积是多少立方米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

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

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

<gadget id="calculator">(1/3) / (2/3)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3.14 * 4 * 2.5 * (1/2)</gadget>
<output>15.7</output>

<result>15.7</result>