A cuboid glass fish tank without a cover is 3 meters long, 0.5 meters wide, and 2 meters high. How many square meters of glass is needed to make such a fish tank?
长方体无盖的玻璃鱼缸，长3米，宽0.5米，高2米，做这样的一个鱼缸，需玻璃多少平方米？
<gadget id="calculator">5 * 0.5</gadget>
<output>2.5</output>

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

<gadget id="calculator">0.5 * 2</gadget>
<output>1</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">2.5 + 14</gadget>
<output>16.5</output>

<result>16.5</result>