Cut off a square of 5 cm from each of the 4 corners of a piece of iron sheet with a length of 30 cm and a width of 25 cm, and weld the remaining part into a cuboid container. What is the maximum volume of this container in liters?
把一块长30厘米、宽25厘米的铁皮4个角各剪去一个边长5厘米的正方形后，把剩余部分焊接成一个长方体容器，这个容器的最大容积是多少升．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">30 - 10</gadget>
<output>20</output>

<gadget id="calculator">25 - 10</gadget>
<output>15</output>

<gadget id="calculator">5 / 1_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">20 * 15 * (1/200)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>