A cuboid glass container in the teacher's office is measured from the inside as 3dm in length and width, and 18cm in height. Pour 4.5L of water into the container, and then submerge a pear in the water. At this time, the water depth in the container is measured to be 15cm. What is the volume of this Sydney?
教师办公室一个长方体玻璃容器，从里面量长、宽均为3dm，高18cm，向容器中倒入4.5L水，再把一个雪梨浸没在水中，这时量得容器内的水深是15cm．这个雪梨的体积是多少？
<gadget id="calculator">15 / 10</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">3 * 3 * (3/2)</gadget>
<output>27/2 = around 13.5</output>

<gadget id="calculator">(27/2) - 4.5</gadget>
<output>9</output>

<result>9</result>