A conical publicity material has a bottom area of 9 square decimeters and a height of 3 decimeters. It is filled with water. Pour all the water into a cylindrical publicity material with a bottom area of 4.5 square decimeters. How deep is the water?
一个圆锥形宣传品的底面积是9平方分米，高3分米，里面装满水，把这些水全部倒入底面积是4.5平方分米圆柱形宣传品内，水深几分米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 4.5</gadget>
<output>0.666667</output>

<gadget id="calculator">(1/3) * 9 * 0.666667</gadget>
<output>2.000001</output>

<result>2.000001</result>