Huanhuan packs a cube gift box with a side length of (5/2) decimeters, how much wrapping paper is needed at least?
欢欢包装一个棱长(5/2)分米的正方体礼盒，至少需要多少大的包装纸？
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) * (5/2) * 6</gadget>
<output>75/2 = around 37.5</output>

<result>75/2 = around 37.5</result>