A cuboid glass container, measured from the inside, is 2dm in length and width, pour 6.5L of water into the container, and then put an apple into the water. At this time, the water depth in the container is measured to be 18cm. What is the volume of the apple?
一个长方体玻璃容器，从里面量长、宽均为2dm，向容器中倒入6.5L水，再把一个苹果放入水中．这时量得容器内的水深是18cm，这个苹果的体积是多少？
<gadget id="calculator">18 / 10</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">2 * 2 * (9/5)</gadget>
<output>36/5 = around 7.2</output>

<gadget id="calculator">(36/5) - 6.5</gadget>
<output>0.7</output>

<result>0.7</result>