To make a cubic iron cylinder without a cover, the iron sheet is 180cm**2 in total. If you want to fill this iron cylinder with water, how many ml of water can it hold?
做一个无盖正方体铁筒，共需铁皮180cm**2，如果要向这个铁筒里装水，求可以装水多少ml．
<gadget id="calculator">6 * 6 * 6</gadget>
<output>216</output>

<result>216</result>