A cubic iron sheet measuring cup without a cover can hold 1 liter of water, how many square decimeters of iron sheet should be used to make this measuring cup
一个无盖的立方体铁皮量杯可装水1升，做这个量杯至少要用铁皮多少平方分米
<gadget id="calculator">1 * 1 * 5</gadget>
<output>5</output>

<result>5</result>