A cuboid glass container is 2 decimeters in length and width measured from inside. Now pour 5.5 liters of water into the container, and then put an apple into it. At this time, the water depth in the container is 15 cm. What is the volume of this apple?
一个长方体玻璃容器，从里面量长和宽均为2分米．现在向容器中倒入5.5升的水，再把一个苹果放进去，这时容器中的水深15厘米．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>