How many square meters of cardboard is needed to make a cube carton with a side length of 2.5 decimeters?
用纸板做一个棱长为2.5分米的正方体纸箱，至少需要纸板多少平方米？
<gadget id="calculator">6 / 100</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">2.5 * 2.5 * (3/50)</gadget>
<output>0.375</output>

<result>0.375</result>