cuboid glass container, measured from the inside, has a length and width of 3dm, pours 7.2L of water into the container, and then puts a pear into the water (the pear is completely submerged in the water), then the water depth in the container is measured to be 9cm ． What is the volume of this pear?
一个长方体的玻璃容器，从里面量，长、宽均为3dm，向容器中倒入7.2L水，再把一个梨放入水中(梨完全没入水中)，这时量得容器内的水深是9cm．这个梨的体积是多少？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">3 * 3 * (9/10)</gadget>
<output>81/10 = around 8.1</output>

<gadget id="calculator">(81/10) - 7.2</gadget>
<output>0.9</output>

<result>0.9</result>