A cuboid glass container, measured from the inside, is 3dm in length and width. Pour 8.5L of water into the container, and then put an apple into the container and submerge it in the water. At this time, the water depth in the container is measured to be 1dm. The apple What is its volume?
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8.5L的水，再把一个苹果放入容器且没于水中，这时量得容器内的水深1dm，这个苹果的体积是多少？
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">8.5 / 9</gadget>
<output>0.944444</output>

<gadget id="calculator">1 - 0.944444</gadget>
<output>0.055556</output>

<gadget id="calculator">3 * 3 * 0.055556</gadget>
<output>0.500004</output>

<result>0.500004</result>