How many square meters of cardboard should be used to make two cube cartons with edge lengths of (1/2) meters?
做两个棱长是(1/2)米的正方体纸箱，至少要用多少平方米硬纸板？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2) * 6 * 2</gadget>
<output>3</output>

<result>3</result>