If a carpenter makes a box with a side length of 1.2 meters without a cover, how many square meters should be used at least?
木工做一个棱长是1.2米的正方体无盖木箱，至少用木板多少平方米？
<gadget id="calculator">1.2 * 1.2 * 5</gadget>
<output>7.2</output>

<result>7.2</result>