A cylindrical bucket has a capacity of 100 liters and a base area of 20 square decimeters. If filled with water (4/5), how many decimeters is the water depth?
一个圆柱形水桶，容积是100升，底面积是20平方分米．如果盛水(4/5)，水深是多少分米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 20</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">100 * (1/25)</gadget>
<output>4</output>

<result>4</result>