A kind of bottle. The body of the bottle is a cuboid. The inside is measured to be 6 cm long and 5 cm wide. Cong Cong pours a certain amount of water into the bottle and measures the water height to be 12 cm. The height is 3 cm. Find the maximum volume of the bottle.
一种瓶子，瓶身是长方体，测得里面长6厘米，宽5厘米，聪聪将瓶中注入一定量的水，测得水高12厘米，然后聪聪将瓶子倒过来，测得上面空的高度为3厘米．求瓶子的最大容积．
<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<gadget id="calculator">6 * 5 * 15</gadget>
<output>450</output>

<result>450</result>