The master carpenter has made five cube parts boxes (without covers) whose edge lengths are all 3 decimeters. How many square decimeters of wooden boards should be used at least?
木工师傅做了五个棱长都是3分米的正方体零件箱(无盖)，至少要用多少平方分米的木板？
<gadget id="calculator">3 * 3 * 5</gadget>
<output>45</output>

<gadget id="calculator">45 * 5</gadget>
<output>225</output>

<result>225</result>