The size of Li Caijin's refrigerator box is: 120*30*30 (unit: cm). He puts the carton in the storage room, and the carton occupies the least amount of space.
李财金装冰箱的箱子规格是：120*30*30(单位：厘米)，他把纸箱放到储藏室中，纸箱占地最少多少．
<gadget id="calculator">30 * 30</gadget>
<output>900</output>

<result>900</result>