Make a cuboid glass fish tank without a cover, 0.8 meters long, 0.6 meters wide, and 0.5 meters high. How many square meters of glass do you need to make this fish tank?
做一个无盖的长方体玻璃鱼缸，长0.8米，宽0.6米，高0.5米．做这个鱼缸至少需要多少平方米的玻璃？
<gadget id="calculator">0.8 * 0.6</gadget>
<output>0.48</output>

<gadget id="calculator">0.8 * 0.5 * 2</gadget>
<output>0.8</output>

<gadget id="calculator">0.6 * 0.5 * 2</gadget>
<output>0.6</output>

<gadget id="calculator">0.48 + 0.8 + 0.6</gadget>
<output>1.88</output>

<result>1.88</result>