A cylindrical container, measured from the inside, has a base diameter of 20 cm. If there is 20 cm deep water in this container, then the water depth is equivalent to (4/5) of the depth of the cylindrical container. What is the volume in cubic centimeters of this cylindrical container?
一种圆柱形容器，从里面量，底面直径20厘米．如果在这个容器中盛有20厘米深的水，这时水深相当于圆柱形容器深的(4/5)．这个圆柱形容器的容积是多少立方厘米？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">20 / (4/5)</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 100 * 25</gadget>
<output>7_850</output>

<result>7_850</result>