The volume of a cylindrical bucket is 120 liters, and the area of the bottom measured from the bottom is 30 square decimeters. If (3/4) of the water is filled, how many decimeters is the water surface high?
一个圆柱形水桶的容积是120升，从底面量底面积是30平方分米，装了(3/4)的水，水面高多少分米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) / 30</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">120 * (1/40)</gadget>
<output>3</output>

<result>3</result>