A cube glass container has a side length of 2dm measured from the inside. Pour 5.5L 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 15cm. What is the volume of this apple?
一个正方体玻璃容器，从里面量棱长是2dm．向容器中倒入5.5L水，再把一个苹果放入水中，这时量得容器内的水深是15cm．这个苹果的体积是多少？
<gadget id="calculator">15 / 10</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">2 * 2 * (3/2)</gadget>
<output>6</output>

<gadget id="calculator">6 - 5.5</gadget>
<output>0.5</output>

<result>0.5</result>