A piece of iron sheet is 60 cm long and 40 cm wide. Use it to make a cube iron box without a cover (can be cut and welded). What is the maximum volume of this iron box in liters?
一张铁皮长60厘米，宽40厘米，用它做成一个无盖的正方体铁盒(可以剪、焊接)，这个铁盒容积最大是多少升？
<gadget id="calculator">5 / 1_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">40 * 40 * (1/200)</gadget>
<output>8</output>

<result>8</result>